Fixing up DOM constructors.

sdk/lib/html/dart2js/html_dart2js.dart

 /// The Dart HTML library.
 ///
 /// For examples, see
 /// [Dart HTML5 Samples](https://github.com/dart-lang/dart-html5-samples)
 /// on Github.
 library dart.dom.html;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:_collection-dev' hide Symbol;
@@ skipping 60 matching lines @@
 Future<SendPort> spawnDomFunction(Function f) =>
   new Future.value(IsolateNatives.spawnDomFunction(f));
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('AbstractWorker')
 class AbstractWorker extends EventTarget native "AbstractWorker" {
+  // To suppress missing implicit constructor warnings.
+  factory AbstractWorker._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('AbstractWorker.errorEvent')
   @DocsEditable
   static const EventStreamProvider<ErrorEvent> errorEvent = const EventStreamProvider<ErrorEvent>('error');
 
   @JSName('addEventListener')
   @DomName('AbstractWorker.addEventListener')
   @DocsEditable
   void $dom_addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
@@ skipping 11 matching lines @@
   Stream<ErrorEvent> get onError => errorEvent.forTarget(this);
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLAnchorElement')
 class AnchorElement extends _HTMLElement native "HTMLAnchorElement" {
+  // To suppress missing implicit constructor warnings.
+  factory AnchorElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLAnchorElement.HTMLAnchorElement')
   @DocsEditable
   factory AnchorElement({String href}) {
     var e = document.$dom_createElement("a");
     if (href != null) e.href = href;
     return e;
   }
 
   @DomName('HTMLAnchorElement.download')
@@ skipping 74 matching lines @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('WebKitAnimationEvent')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 class AnimationEvent extends Event native "WebKitAnimationEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory AnimationEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('WebKitAnimationEvent.animationName')
   @DocsEditable
   final String animationName;
 
   @DomName('WebKitAnimationEvent.elapsedTime')
   @DocsEditable
   final num elapsedTime;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DOMApplicationCache')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.FIREFOX)
 @SupportedBrowser(SupportedBrowser.IE, '10')
 @SupportedBrowser(SupportedBrowser.OPERA)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Unstable
 class ApplicationCache extends EventTarget native "ApplicationCache,DOMApplicationCache,OfflineResourceList" {
+  // To suppress missing implicit constructor warnings.
+  factory ApplicationCache._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('DOMApplicationCache.cachedEvent')
   @DocsEditable
   static const EventStreamProvider<Event> cachedEvent = const EventStreamProvider<Event>('cached');
 
   @DomName('DOMApplicationCache.checkingEvent')
   @DocsEditable
   static const EventStreamProvider<Event> checkingEvent = const EventStreamProvider<Event>('checking');
 
   @DomName('DOMApplicationCache.downloadingEvent')
@@ skipping 120 matching lines @@
  *
  * The element can also define an uninteractive region of the map.
  *
  * See also:
  *
  * * [<area>](https://developer.mozilla.org/en-US/docs/HTML/Element/area)
  * on MDN.
  */
 @DomName('HTMLAreaElement')
 class AreaElement extends _HTMLElement native "HTMLAreaElement" {
+  // To suppress missing implicit constructor warnings.
+  factory AreaElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLAreaElement.HTMLAreaElement')
   @DocsEditable
   factory AreaElement() => document.$dom_createElement("area");
 
   @DomName('HTMLAreaElement.alt')
   @DocsEditable
   String alt;
 
   @DomName('HTMLAreaElement.coords')
@@ skipping 47 matching lines @@
   String target;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLAudioElement')
 class AudioElement extends MediaElement native "HTMLAudioElement" {
+  // To suppress missing implicit constructor warnings.
+  factory AudioElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLAudioElement.HTMLAudioElement')
   @DocsEditable
   factory AudioElement([String src]) {
     if (src != null) {
       return AudioElement._create_1(src);
     }
     return AudioElement._create_2();
   }
   static AudioElement _create_1(src) => JS('AudioElement', 'new Audio(#)', src);
   static AudioElement _create_2() => JS('AudioElement', 'new Audio()');
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('AutocompleteErrorEvent')
 // http://wiki.whatwg.org/wiki/RequestAutocomplete
 @Experimental
 class AutocompleteErrorEvent extends Event native "AutocompleteErrorEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory AutocompleteErrorEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('AutocompleteErrorEvent.reason')
   @DocsEditable
   final String reason;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLBRElement')
 class BRElement extends _HTMLElement native "HTMLBRElement" {
+  // To suppress missing implicit constructor warnings.
+  factory BRElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLBRElement.HTMLBRElement')
   @DocsEditable
   factory BRElement() => document.$dom_createElement("br");
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('BarProp')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/browsers.html#barprop
 @deprecated // standard
-class BarProp native "BarProp" {
+class BarProp extends Interceptor native "BarProp" {
 
   @DomName('BarProp.visible')
   @DocsEditable
   final bool visible;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLBaseElement')
 class BaseElement extends _HTMLElement native "HTMLBaseElement" {
+  // To suppress missing implicit constructor warnings.
+  factory BaseElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLBaseElement.HTMLBaseElement')
   @DocsEditable
   factory BaseElement() => document.$dom_createElement("base");
 
   @DomName('HTMLBaseElement.href')
   @DocsEditable
   String href;
 
   @DomName('HTMLBaseElement.target')
   @DocsEditable
   String target;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('BeforeLoadEvent')
 @Experimental
 class BeforeLoadEvent extends Event native "BeforeLoadEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory BeforeLoadEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('BeforeLoadEvent.url')
   @DocsEditable
   final String url;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('Blob')
-class Blob native "Blob" {
+class Blob extends Interceptor native "Blob" {
 
   @DomName('Blob.size')
   @DocsEditable
   final int size;
 
   @DomName('Blob.type')
   @DocsEditable
   final String type;
 
   @DomName('Blob.slice')
@@ skipping 21 matching lines @@
 }
 
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLBodyElement')
 class BodyElement extends _HTMLElement native "HTMLBodyElement" {
+  // To suppress missing implicit constructor warnings.
+  factory BodyElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLBodyElement.blurEvent')
   @DocsEditable
   static const EventStreamProvider<Event> blurEvent = const EventStreamProvider<Event>('blur');
 
   @DomName('HTMLBodyElement.errorEvent')
   @DocsEditable
   static const EventStreamProvider<Event> errorEvent = const EventStreamProvider<Event>('error');
 
   @DomName('HTMLBodyElement.focusEvent')
@@ skipping 89 matching lines @@
   Stream<Event> get onUnload => unloadEvent.forTarget(this);
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLButtonElement')
 class ButtonElement extends _HTMLElement native "HTMLButtonElement" {
+  // To suppress missing implicit constructor warnings.
+  factory ButtonElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLButtonElement.HTMLButtonElement')
   @DocsEditable
   factory ButtonElement() => document.$dom_createElement("button");
 
   @DomName('HTMLButtonElement.autofocus')
   @DocsEditable
   bool autofocus;
 
   @DomName('HTMLButtonElement.disabled')
@@ skipping 66 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CDATASection')
 // http://dom.spec.whatwg.org/#cdatasection
 @deprecated // deprecated
 class CDataSection extends Text native "CDATASection" {
+  // To suppress missing implicit constructor warnings.
+  factory CDataSection._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Canvas2DContextAttributes')
 // http://wiki.whatwg.org/wiki/CanvasOpaque#Suggested_IDL
 @Experimental
-class Canvas2DContextAttributes native "Canvas2DContextAttributes" {
+class Canvas2DContextAttributes extends Interceptor native "Canvas2DContextAttributes" {
 
   @DomName('Canvas2DContextAttributes.alpha')
   @DocsEditable
   bool alpha;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('HTMLCanvasElement')
 class CanvasElement extends _HTMLElement implements CanvasImageSource native "HTMLCanvasElement" {
+  // To suppress missing implicit constructor warnings.
+  factory CanvasElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLCanvasElement.webglcontextlostEvent')
   @DocsEditable
   static const EventStreamProvider<gl.ContextEvent> webGlContextLostEvent = const EventStreamProvider<gl.ContextEvent>('webglcontextlost');
 
   @DomName('HTMLCanvasElement.webglcontextrestoredEvent')
   @DocsEditable
   static const EventStreamProvider<gl.ContextEvent> webGlContextRestoredEvent = const EventStreamProvider<gl.ContextEvent>('webglcontextrestored');
 
   @DomName('HTMLCanvasElement.HTMLCanvasElement')
@@ skipping 143 matching lines @@
  *     ctx.save();
  *     document.body.children.add(canvas);
  *
  * See also:
  *
  * * [CanvasGradient](https://developer.mozilla.org/en-US/docs/DOM/CanvasGradient) from MDN.
  * * [CanvasGradient](http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#canvasgradient) from whatwg.
  * * [CanvasGradient](http://www.w3.org/TR/2010/WD-2dcontext-20100304/#canvasgradient) from W3C.
  */
 @DomName('CanvasGradient')
-class CanvasGradient native "CanvasGradient" {
+class CanvasGradient extends Interceptor native "CanvasGradient" {
 
   /**
    * Adds a color stop to this gradient at the offset.
    *
    * The [offset] can range between 0.0 and 1.0.
    *
    * See also:
    *
    * * [Multiple Color Stops](https://developer.mozilla.org/en-US/docs/CSS/linear-gradient#Gradient_with_multiple_color_stops) from MDN.
    */
@@ skipping 28 matching lines @@
  *     });
  *     img.src = "images/foo.jpg";
  *     document.body.children.add(canvas);
  *
  * See also:
  * * [CanvasPattern](https://developer.mozilla.org/en-US/docs/DOM/CanvasPattern) from MDN.
  * * [CanvasPattern](http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#canvaspattern) from whatwg.
  * * [CanvasPattern](http://www.w3.org/TR/2010/WD-2dcontext-20100304/#canvaspattern) from W3C.
  */
 @DomName('CanvasPattern')
-class CanvasPattern native "CanvasPattern" {
+class CanvasPattern extends Interceptor native "CanvasPattern" {
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 /**
  * A rendering context for a canvas element.
  *
  * This context is extended by [CanvasRenderingContext2D] and
  * [WebGLRenderingContext].
  */
 @DomName('CanvasRenderingContext')
-class CanvasRenderingContext native "CanvasRenderingContext" {
+class CanvasRenderingContext extends Interceptor native "CanvasRenderingContext" {
 
   /// Reference to the canvas element to which this context belongs.
   @DomName('CanvasRenderingContext.canvas')
   @DocsEditable
   final CanvasElement canvas;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('CanvasRenderingContext2D')
 class CanvasRenderingContext2D extends CanvasRenderingContext native "CanvasRenderingContext2D" {
+  // To suppress missing implicit constructor warnings.
+  factory CanvasRenderingContext2D._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('CanvasRenderingContext2D.currentPath')
   @DocsEditable
   // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#path-objects
   @Experimental
   Path currentPath;
 
   @DomName('CanvasRenderingContext2D.fillStyle')
   @DocsEditable
   @Creates('String|CanvasGradient|CanvasPattern')
@@ skipping 536 matching lines @@
 }
 
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CharacterData')
 class CharacterData extends Node native "CharacterData" {
+  // To suppress missing implicit constructor warnings.
+  factory CharacterData._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('CharacterData.data')
   @DocsEditable
   String data;
 
   @DomName('CharacterData.length')
   @DocsEditable
   final int length;
 
   @DomName('CharacterData.nextElementSibling')
@@ skipping 25 matching lines @@
   String substringData(int offset, int length) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CloseEvent')
 class CloseEvent extends Event native "CloseEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory CloseEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('CloseEvent.code')
   @DocsEditable
   final int code;
 
   @DomName('CloseEvent.reason')
   @DocsEditable
   final String reason;
 
   @DomName('CloseEvent.wasClean')
   @DocsEditable
   final bool wasClean;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Comment')
 class Comment extends CharacterData native "Comment" {
+  // To suppress missing implicit constructor warnings.
+  factory Comment._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('Comment.Comment')
   @DocsEditable
   factory Comment([String data]) {
     if (data != null) {
       return Comment._create_1(data);
     }
     return Comment._create_2();
   }
   static Comment _create_1(data) => JS('Comment', 'new Comment(#)', data);
   static Comment _create_2() => JS('Comment', 'new Comment()');
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Composition')
 // http://www.w3.org/TR/ime-api/#idl-def-Composition
 @Experimental
-class Composition native "Composition" {
+class Composition extends Interceptor native "Composition" {
 
   @DomName('Composition.caret')
   @DocsEditable
   final Range caret;
 
   @DomName('Composition.text')
   @DocsEditable
   final Node text;
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // WARNING: Do not edit - generated code.
 
 
 @DomName('CompositionEvent')
 class CompositionEvent extends UIEvent native "CompositionEvent" {
   factory CompositionEvent(String type,
       {bool canBubble: false, bool cancelable: false, Window view,
       String data}) {
     if (view == null) {
       view = window;
     }
     var e = document.$dom_createEvent("CompositionEvent");
     e.$dom_initCompositionEvent(type, canBubble, cancelable, view, data);
     return e;
   }
+  // To suppress missing implicit constructor warnings.
+  factory CompositionEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('CompositionEvent.data')
   @DocsEditable
   final String data;
 
   @JSName('initCompositionEvent')
   @DomName('CompositionEvent.initCompositionEvent')
   @DocsEditable
   void $dom_initCompositionEvent(String typeArg, bool canBubbleArg, bool cancelableArg, Window viewArg, String dataArg) native;
 
@@ skipping 105 matching lines @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLContentElement')
 @SupportedBrowser(SupportedBrowser.CHROME, '26')
 @Experimental
 // https://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/shadow/index.html#content-element
 class ContentElement extends _HTMLElement native "HTMLContentElement" {
+  // To suppress missing implicit constructor warnings.
+  factory ContentElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLContentElement.HTMLContentElement')
   @DocsEditable
   factory ContentElement() => document.$dom_createElement("content");
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => Element.isTagSupported('content');
 
   @DomName('HTMLContentElement.resetStyleInheritance')
   @DocsEditable
   bool resetStyleInheritance;
 
   @DomName('HTMLContentElement.select')
   @DocsEditable
   String select;
 
   @DomName('HTMLContentElement.getDistributedNodes')
   @DocsEditable
   @Returns('NodeList')
   @Creates('NodeList')
   List<Node> getDistributedNodes() native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Coordinates')
-class Coordinates native "Coordinates" {
+class Coordinates extends Interceptor native "Coordinates" {
 
   @DomName('Coordinates.accuracy')
   @DocsEditable
   final num accuracy;
 
   @DomName('Coordinates.altitude')
   @DocsEditable
   final num altitude;
 
   @DomName('Coordinates.altitudeAccuracy')
@@ skipping 20 matching lines @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Crypto')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 // http://www.w3.org/TR/WebCryptoAPI/
-class Crypto native "Crypto" {
+class Crypto extends Interceptor native "Crypto" {
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => JS('bool', '!!(window.crypto && window.crypto.getRandomValues)');
 
   @DomName('Crypto.getRandomValues')
   @DocsEditable
   @Creates('TypedData')
   @Returns('TypedData|Null')
   TypedData getRandomValues(TypedData array) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CSS')
 // http://www.w3.org/TR/css3-conditional/#the-css-interface
 @Experimental // None
-class Css native "CSS" {
+class Css extends Interceptor native "CSS" {
 
   @DomName('CSS.supports')
   @DocsEditable
   bool supports(String conditionText_OR_property, [String value]) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CSSCharsetRule')
 // http://dev.w3.org/csswg/cssom/#the-csscharsetrule-interface
 @Experimental
 class CssCharsetRule extends CssRule native "CSSCharsetRule" {
+  // To suppress missing implicit constructor warnings.
+  factory CssCharsetRule._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('CSSCharsetRule.encoding')
   @DocsEditable
   String encoding;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('WebKitCSSFilterRule')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 // http://www.w3.org/TR/filter-effects/
 class CssFilterRule extends CssRule native "WebKitCSSFilterRule" {
+  // To suppress missing implicit constructor warnings.
+  factory CssFilterRule._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('WebKitCSSFilterRule.style')
   @DocsEditable
   final CssStyleDeclaration style;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('WebKitCSSFilterValue')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 // http://dev.w3.org/csswg/cssom/
 @deprecated // deprecated
 class CssFilterValue extends _CssValueList native "WebKitCSSFilterValue" {
+  // To suppress missing implicit constructor warnings.
+  factory CssFilterValue._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('WebKitCSSFilterValue.CSS_FILTER_BLUR')
   @DocsEditable
   static const int CSS_FILTER_BLUR = 10;
 
   @DomName('WebKitCSSFilterValue.CSS_FILTER_BRIGHTNESS')
   @DocsEditable
   static const int CSS_FILTER_BRIGHTNESS = 8;
 
   @DomName('WebKitCSSFilterValue.CSS_FILTER_CONTRAST')
@@ skipping 47 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CSSFontFaceLoadEvent')
 // http://www.w3.org/TR/css3-fonts/
 @Experimental
 class CssFontFaceLoadEvent extends Event native "CSSFontFaceLoadEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory CssFontFaceLoadEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('CSSFontFaceLoadEvent.error')
   @DocsEditable
   final DomError error;
 
   @DomName('CSSFontFaceLoadEvent.fontface')
   @DocsEditable
   final CssFontFaceRule fontface;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CSSFontFaceRule')
 class CssFontFaceRule extends CssRule native "CSSFontFaceRule" {
+  // To suppress missing implicit constructor warnings.
+  factory CssFontFaceRule._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('CSSFontFaceRule.style')
   @DocsEditable
   final CssStyleDeclaration style;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CSSHostRule')
 @SupportedBrowser(SupportedBrowser.CHROME, '26')
 @Experimental
 // https://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/shadow/index.html#css-host-rule-interface
 class CssHostRule extends CssRule native "CSSHostRule" {
+  // To suppress missing implicit constructor warnings.
+  factory CssHostRule._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('CSSHostRule.cssRules')
   @DocsEditable
   @Returns('_CssRuleList')
   @Creates('_CssRuleList')
   final List<CssRule> cssRules;
 
   @DomName('CSSHostRule.deleteRule')
   @DocsEditable
   void deleteRule(int index) native;
 
   @DomName('CSSHostRule.insertRule')
   @DocsEditable
   int insertRule(String rule, int index) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CSSImportRule')
 class CssImportRule extends CssRule native "CSSImportRule" {
+  // To suppress missing implicit constructor warnings.
+  factory CssImportRule._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('CSSImportRule.href')
   @DocsEditable
   final String href;
 
   @DomName('CSSImportRule.media')
   @DocsEditable
   final MediaList media;
 
   @DomName('CSSImportRule.styleSheet')
   @DocsEditable
   final CssStyleSheet styleSheet;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('WebKitCSSKeyframeRule')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 // http://www.w3.org/TR/css3-animations/#CSSKeyframeRule-interface
 class CssKeyframeRule extends CssRule native "CSSKeyframeRule,MozCSSKeyframeRule,WebKitCSSKeyframeRule" {
+  // To suppress missing implicit constructor warnings.
+  factory CssKeyframeRule._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('WebKitCSSKeyframeRule.keyText')
   @DocsEditable
   String keyText;
 
   @DomName('WebKitCSSKeyframeRule.style')
   @DocsEditable
   final CssStyleDeclaration style;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('WebKitCSSKeyframesRule')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 // http://www.w3.org/TR/css3-animations/#csskeyframesrule
 class CssKeyframesRule extends CssRule native "CSSKeyframesRule,MozCSSKeyframesRule,WebKitCSSKeyframesRule" {
+  // To suppress missing implicit constructor warnings.
+  factory CssKeyframesRule._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('WebKitCSSKeyframesRule.cssRules')
   @DocsEditable
   @Returns('_CssRuleList')
   @Creates('_CssRuleList')
   final List<CssRule> cssRules;
 
   @DomName('WebKitCSSKeyframesRule.name')
   @DocsEditable
   String name;
@@ skipping 27 matching lines @@
 @DocsEditable
 @DomName('WebKitCSSMatrix')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 // http://dev.w3.org/csswg/cssom/
 @deprecated // deprecated
-class CssMatrix native "WebKitCSSMatrix" {
+class CssMatrix extends Interceptor native "WebKitCSSMatrix" {
 
   @DomName('WebKitCSSMatrix.CSSMatrix')
   @DocsEditable
   factory CssMatrix([String cssValue]) {
     if (cssValue != null) {
       return CssMatrix._create_1(cssValue);
     }
     return CssMatrix._create_2();
   }
   static CssMatrix _create_1(cssValue) => JS('CssMatrix', 'new WebKitCSSMatrix(#)', cssValue);
@@ skipping 128 matching lines @@
   CssMatrix translate(num x, num y, num z) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CSSMediaRule')
 class CssMediaRule extends CssRule native "CSSMediaRule" {
+  // To suppress missing implicit constructor warnings.
+  factory CssMediaRule._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('CSSMediaRule.cssRules')
   @DocsEditable
   @Returns('_CssRuleList')
   @Creates('_CssRuleList')
   final List<CssRule> cssRules;
 
   @DomName('CSSMediaRule.media')
   @DocsEditable
   final MediaList media;
@@ skipping 12 matching lines @@
 
 
 @DocsEditable
 @DomName('WebKitCSSMixFunctionValue')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 // http://dev.w3.org/csswg/cssom/
 @deprecated // deprecated
 class CssMixFunctionValue extends _CssValueList native "WebKitCSSMixFunctionValue" {
+  // To suppress missing implicit constructor warnings.
+  factory CssMixFunctionValue._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CSSPageRule')
 class CssPageRule extends CssRule native "CSSPageRule" {
+  // To suppress missing implicit constructor warnings.
+  factory CssPageRule._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('CSSPageRule.selectorText')
   @DocsEditable
   String selectorText;
 
   @DomName('CSSPageRule.style')
   @DocsEditable
   final CssStyleDeclaration style;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('WebKitCSSRegionRule')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 // http://dev.w3.org/csswg/css-regions/#region-style-rule-interface
 class CssRegionRule extends CssRule native "WebKitCSSRegionRule" {
+  // To suppress missing implicit constructor warnings.
+  factory CssRegionRule._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('WebKitCSSRegionRule.cssRules')
   @DocsEditable
   @Returns('_CssRuleList')
   @Creates('_CssRuleList')
   final List<CssRule> cssRules;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CSSRule')
-class CssRule native "CSSRule" {
+class CssRule extends Interceptor native "CSSRule" {
 
   @DomName('CSSRule.CHARSET_RULE')
   @DocsEditable
   static const int CHARSET_RULE = 2;
 
   @DomName('CSSRule.FONT_FACE_RULE')
   @DocsEditable
   static const int FONT_FACE_RULE = 5;
 
   @DomName('CSSRule.HOST_RULE')
@@ skipping 67 matching lines @@
   @DomName('CSSRule.type')
   @DocsEditable
   final int type;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('CSSStyleDeclaration')
-class CssStyleDeclaration native "CSSStyleDeclaration,MSStyleCSSProperties,CSS2Properties" {
+class CssStyleDeclaration extends Interceptor native "CSSStyleDeclaration,MSStyleCSSProperties,CSS2Properties" {
   factory CssStyleDeclaration() => new CssStyleDeclaration.css('');
 
   factory CssStyleDeclaration.css(String css) {
     final style = new Element.tag('div').style;
     style.cssText = css;
     return style;
   }
 
 
   @DomName('CSSStyleDeclaration.cssText')
@@ skipping 3221 matching lines @@
   }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CSSStyleRule')
 class CssStyleRule extends CssRule native "CSSStyleRule" {
+  // To suppress missing implicit constructor warnings.
+  factory CssStyleRule._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('CSSStyleRule.selectorText')
   @DocsEditable
   String selectorText;
 
   @DomName('CSSStyleRule.style')
   @DocsEditable
   final CssStyleDeclaration style;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CSSStyleSheet')
 class CssStyleSheet extends StyleSheet native "CSSStyleSheet" {
+  // To suppress missing implicit constructor warnings.
+  factory CssStyleSheet._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('CSSStyleSheet.cssRules')
   @DocsEditable
   @Returns('_CssRuleList')
   @Creates('_CssRuleList')
   final List<CssRule> cssRules;
 
   @DomName('CSSStyleSheet.ownerRule')
   @DocsEditable
   final CssRule ownerRule;
@@ skipping 24 matching lines @@
   void removeRule(int index) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CSSSupportsRule')
 class CssSupportsRule extends CssRule native "CSSSupportsRule" {
+  // To suppress missing implicit constructor warnings.
+  factory CssSupportsRule._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('CSSSupportsRule.conditionText')
   @DocsEditable
   final String conditionText;
 
   @DomName('CSSSupportsRule.cssRules')
   @DocsEditable
   @Returns('_CssRuleList')
   @Creates('_CssRuleList')
   final List<CssRule> cssRules;
@@ skipping 12 matching lines @@
 
 
 @DocsEditable
 @DomName('WebKitCSSTransformValue')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 // http://dev.w3.org/csswg/cssom/
 @deprecated // deprecated
 class CssTransformValue extends _CssValueList native "WebKitCSSTransformValue" {
+  // To suppress missing implicit constructor warnings.
+  factory CssTransformValue._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('WebKitCSSTransformValue.CSS_MATRIX')
   @DocsEditable
   static const int CSS_MATRIX = 11;
 
   @DomName('WebKitCSSTransformValue.CSS_MATRIX3D')
   @DocsEditable
   static const int CSS_MATRIX3D = 21;
 
   @DomName('WebKitCSSTransformValue.CSS_PERSPECTIVE')
@@ skipping 83 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CSSUnknownRule')
 // http://dev.w3.org/csswg/cssom/#the-cssstylesheet-interface
 @deprecated // deprecated
 class CssUnknownRule extends CssRule native "CSSUnknownRule" {
+  // To suppress missing implicit constructor warnings.
+  factory CssUnknownRule._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CustomElementConstructor')
 // https://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/custom/index.html#dfn-custom-element-constructor-generation
 @deprecated // experimental
-class CustomElementConstructor native "CustomElementConstructor" {
+class CustomElementConstructor extends Interceptor native "CustomElementConstructor" {
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // WARNING: Do not edit - generated code.
 
 
 @DomName('CustomEvent')
 class CustomEvent extends Event native "CustomEvent" {
   factory CustomEvent(String type,
       {bool canBubble: true, bool cancelable: true, Object detail}) {
 
     final CustomEvent e = document.$dom_createEvent("CustomEvent");
     e.$dom_initCustomEvent(type, canBubble, cancelable, detail);
 
     return e;
   }
+  // To suppress missing implicit constructor warnings.
+  factory CustomEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('CustomEvent.detail')
   @DocsEditable
   @Creates('Null')
   final Object detail;
 
   @JSName('initCustomEvent')
   @DomName('CustomEvent.initCustomEvent')
   @DocsEditable
   void $dom_initCustomEvent(String typeArg, bool canBubbleArg, bool cancelableArg, Object detailArg) native;
 
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLDListElement')
 class DListElement extends _HTMLElement native "HTMLDListElement" {
+  // To suppress missing implicit constructor warnings.
+  factory DListElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLDListElement.HTMLDListElement')
   @DocsEditable
   factory DListElement() => document.$dom_createElement("dl");
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLDataListElement')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.FIREFOX)
 @SupportedBrowser(SupportedBrowser.IE, '10')
 @SupportedBrowser(SupportedBrowser.SAFARI)
 class DataListElement extends _HTMLElement native "HTMLDataListElement" {
+  // To suppress missing implicit constructor warnings.
+  factory DataListElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLDataListElement.HTMLDataListElement')
   @DocsEditable
   factory DataListElement() => document.$dom_createElement("datalist");
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => Element.isTagSupported('datalist');
 
   @DomName('HTMLDataListElement.options')
   @DocsEditable
   final HtmlCollection options;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Clipboard')
-class DataTransfer native "Clipboard" {
+class DataTransfer extends Interceptor native "Clipboard" {
 
   @DomName('Clipboard.dropEffect')
   @DocsEditable
   String dropEffect;
 
   @DomName('Clipboard.effectAllowed')
   @DocsEditable
   String effectAllowed;
 
   @DomName('Clipboard.files')
@@ skipping 44 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DataTransferItem')
 // http://www.w3.org/TR/2011/WD-html5-20110113/dnd.html#the-datatransferitem-interface
 @Experimental
-class DataTransferItem native "DataTransferItem" {
+class DataTransferItem extends Interceptor native "DataTransferItem" {
 
   @DomName('DataTransferItem.kind')
   @DocsEditable
   final String kind;
 
   @DomName('DataTransferItem.type')
   @DocsEditable
   final String type;
 
   @DomName('DataTransferItem.getAsFile')
@@ skipping 25 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DataTransferItemList')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/dnd.html#the-datatransferitemlist-interface
 @Experimental
-class DataTransferItemList native "DataTransferItemList" {
+class DataTransferItemList extends Interceptor native "DataTransferItemList" {
 
   @DomName('DataTransferItemList.length')
   @DocsEditable
   final int length;
 
   @DomName('DataTransferItemList.add')
   @DocsEditable
   void add(data_OR_file, [String type]) native;
 
   @DomName('DataTransferItemList.clear')
@@ skipping 19 matching lines @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLDetailsElement')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 class DetailsElement extends _HTMLElement native "HTMLDetailsElement" {
+  // To suppress missing implicit constructor warnings.
+  factory DetailsElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLDetailsElement.HTMLDetailsElement')
   @DocsEditable
   factory DetailsElement() => document.$dom_createElement("details");
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => Element.isTagSupported('details');
 
   @DomName('HTMLDetailsElement.open')
   @DocsEditable
   bool open;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DeviceAcceleration')
 // http://dev.w3.org/geo/api/spec-source-orientation.html#devicemotion
 @Experimental
-class DeviceAcceleration native "DeviceAcceleration" {
+class DeviceAcceleration extends Interceptor native "DeviceAcceleration" {
 
   @DomName('DeviceAcceleration.x')
   @DocsEditable
   final num x;
 
   @DomName('DeviceAcceleration.y')
   @DocsEditable
   final num y;
 
   @DomName('DeviceAcceleration.z')
   @DocsEditable
   final num z;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DeviceMotionEvent')
 // http://dev.w3.org/geo/api/spec-source-orientation.html#devicemotion
 @Experimental
 class DeviceMotionEvent extends Event native "DeviceMotionEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory DeviceMotionEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('DeviceMotionEvent.acceleration')
   @DocsEditable
   final DeviceAcceleration acceleration;
 
   @DomName('DeviceMotionEvent.accelerationIncludingGravity')
   @DocsEditable
   final DeviceAcceleration accelerationIncludingGravity;
 
   @DomName('DeviceMotionEvent.interval')
   @DocsEditable
   final num interval;
 
   @DomName('DeviceMotionEvent.rotationRate')
   @DocsEditable
   final DeviceRotationRate rotationRate;
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // WARNING: Do not edit - generated code.
 
 @DomName('DeviceOrientationEvent')
 // http://dev.w3.org/geo/api/spec-source-orientation.html#devicemotion
 @Experimental
-
 class DeviceOrientationEvent extends Event native "DeviceOrientationEvent" {
   factory DeviceOrientationEvent(String type,
       {bool canBubble: true, bool cancelable: true, num alpha: 0, num beta: 0,
       num gamma: 0, bool absolute: false}) {
     var e = document.$dom_createEvent("DeviceOrientationEvent");
     e.$dom_initDeviceOrientationEvent(type, canBubble, cancelable, alpha, beta,
         gamma, absolute);
     return e;
   }
+  // To suppress missing implicit constructor warnings.
+  factory DeviceOrientationEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('DeviceOrientationEvent.absolute')
   @DocsEditable
   final bool absolute;
 
   @DomName('DeviceOrientationEvent.alpha')
   @DocsEditable
   final num alpha;
 
   @DomName('DeviceOrientationEvent.beta')
@@ skipping 12 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DeviceRotationRate')
 // http://dev.w3.org/geo/api/spec-source-orientation.html#devicemotion
 @Experimental
-class DeviceRotationRate native "DeviceRotationRate" {
+class DeviceRotationRate extends Interceptor native "DeviceRotationRate" {
 
   @DomName('DeviceRotationRate.alpha')
   @DocsEditable
   final num alpha;
 
   @DomName('DeviceRotationRate.beta')
   @DocsEditable
   final num beta;
 
   @DomName('DeviceRotationRate.gamma')
   @DocsEditable
   final num gamma;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLDialogElement')
 @Unstable
 class DialogElement extends _HTMLElement native "HTMLDialogElement" {
+  // To suppress missing implicit constructor warnings.
+  factory DialogElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLDialogElement.open')
   @DocsEditable
   bool open;
 
   @DomName('HTMLDialogElement.close')
   @DocsEditable
   void close() native;
 
   @DomName('HTMLDialogElement.show')
   @DocsEditable
   void show() native;
 
   @DomName('HTMLDialogElement.showModal')
   @DocsEditable
   void showModal() native;
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('DirectoryEntry')
 // http://www.w3.org/TR/file-system-api/#the-directoryentry-interface
 @Experimental
 class DirectoryEntry extends Entry native "DirectoryEntry" {
-  
+
   /**
    * Create a new directory with the specified `path`. If `exclusive` is true,
    * the returned Future will complete with an error if a directory already
    * exists with the specified `path`.
    */
   Future<Entry> createDirectory(String path, {bool exclusive: false}) {
-    return _getDirectory(path, options: 
+    return _getDirectory(path, options:
         {'create': true, 'exclusive': exclusive});
   }
 
   /**
    * Retrieve an already existing directory entry. The returned future will
    * result in an error if a directory at `path` does not exist or if the item
    * at `path` is not a directory.
    */
   Future<Entry> getDirectory(String path) {
     return _getDirectory(path);
   }
 
   /**
    * Create a new file with the specified `path`. If `exclusive` is true,
    * the returned Future will complete with an error if a file already
    * exists at the specified `path`.
    */
   Future<Entry> createFile(String path, {bool exclusive: false}) {
     return _getFile(path, options: {'create': true, 'exclusive': exclusive});
   }
-  
+
   /**
    * Retrieve an already existing file entry. The returned future will
    * result in an error if a file at `path` does not exist or if the item at
    * `path` is not a file.
    */
   Future<Entry> getFile(String path) {
     return _getFile(path);
   }
+  // To suppress missing implicit constructor warnings.
+  factory DirectoryEntry._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('DirectoryEntry.createReader')
   @DocsEditable
   DirectoryReader createReader() native;
 
   @DomName('DirectoryEntry.getDirectory')
   @DocsEditable
   void __getDirectory(String path, {Map options, _EntryCallback successCallback, _ErrorCallback errorCallback}) {
     if (errorCallback != null) {
       var options_1 = convertDartToNative_Dictionary(options);
@@ skipping 110 matching lines @@
 
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DirectoryReader')
 // http://www.w3.org/TR/file-system-api/#the-directoryreader-interface
 @Experimental
-class DirectoryReader native "DirectoryReader" {
+class DirectoryReader extends Interceptor native "DirectoryReader" {
 
   @JSName('readEntries')
   @DomName('DirectoryReader.readEntries')
   @DocsEditable
   void _readEntries(_EntriesCallback successCallback, [_ErrorCallback errorCallback]) native;
 
   @JSName('readEntries')
   @DomName('DirectoryReader.readEntries')
   @DocsEditable
   Future<List<Entry>> readEntries() {
@@ skipping 26 matching lines @@
  *     document.body.elements.add(elem);
  *
  * See also:
  *
  * * [HTML <div> element](http://www.w3.org/TR/html-markup/div.html) from W3C.
  * * [Block-level element](http://www.w3.org/TR/CSS2/visuren.html#block-boxes) from W3C.
  * * [Inline-level element](http://www.w3.org/TR/CSS2/visuren.html#inline-boxes) from W3C.
  */
 @DomName('HTMLDivElement')
 class DivElement extends _HTMLElement native "HTMLDivElement" {
+  // To suppress missing implicit constructor warnings.
+  factory DivElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLDivElement.HTMLDivElement')
   @DocsEditable
   factory DivElement() => document.$dom_createElement("div");
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 /**
  * The base class for all documents.
  *
  * Each web page loaded in the browser has its own [Document] object, which is
  * typically an [HtmlDocument].
  *
  * If you aren't comfortable with DOM concepts, see the Dart tutorial
  * [Target 2: Connect Dart & HTML](http://www.dartlang.org/docs/tutorials/connect-dart-html/).
  */
 @DomName('Document')
 class Document extends Node  native "Document"
 {
 
+  // To suppress missing implicit constructor warnings.
+  factory Document._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('Document.readystatechangeEvent')
   @DocsEditable
   static const EventStreamProvider<Event> readyStateChangeEvent = const EventStreamProvider<Event>('readystatechange');
 
   @DomName('Document.securitypolicyviolationEvent')
   @DocsEditable
   // https://dvcs.w3.org/hg/content-security-policy/raw-file/tip/csp-specification.dev.html#widl-Document-onsecuritypolicyviolation
   @Experimental
   static const EventStreamProvider<SecurityPolicyViolationEvent> securityPolicyViolationEvent = const EventStreamProvider<SecurityPolicyViolationEvent>('securitypolicyviolation');
@@ skipping 753 matching lines @@
 
 
   /**
    * Parses the specified text as HTML and adds the resulting node after the
    * last child of this document fragment.
    */
   void appendHtml(String text) {
     this.append(new DocumentFragment.html(text));
   }
 
+  // To suppress missing implicit constructor warnings.
+  factory DocumentFragment._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('DocumentFragment.childElementCount')
   @DocsEditable
   final int childElementCount;
 
   @DomName('DocumentFragment.firstElementChild')
   @DocsEditable
   final Element firstElementChild;
 
   @DomName('DocumentFragment.lastElementChild')
@@ skipping 16 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DocumentType')
 // http://www.w3.org/TR/DOM-Level-3-Core/core.html#ID-412266927
 @deprecated // stable
 class DocumentType extends Node native "DocumentType" {
+  // To suppress missing implicit constructor warnings.
+  factory DocumentType._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DOMError')
-class DomError native "DOMError" {
+class DomError extends Interceptor native "DOMError" {
 
   @DomName('DOMError.name')
   @DocsEditable
   final String name;
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('DOMException')
 @Unstable
-class DomException native "DOMException" {
+class DomException extends Interceptor native "DOMException" {
 
   static const String INDEX_SIZE = 'IndexSizeError';
   static const String HIERARCHY_REQUEST = 'HierarchyRequestError';
   static const String WRONG_DOCUMENT = 'WrongDocumentError';
   static const String INVALID_CHARACTER = 'InvalidCharacterError';
   static const String NO_MODIFICATION_ALLOWED = 'NoModificationAllowedError';
   static const String NOT_FOUND = 'NotFoundError';
   static const String NOT_SUPPORTED = 'NotSupportedError';
   static const String INVALID_STATE = 'InvalidStateError';
   static const String SYNTAX = 'SyntaxError';
@@ skipping 30 matching lines @@
   String toString() native;
 
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DOMImplementation')
-class DomImplementation native "DOMImplementation" {
+class DomImplementation extends Interceptor native "DOMImplementation" {
 
   @JSName('createCSSStyleSheet')
   @DomName('DOMImplementation.createCSSStyleSheet')
   @DocsEditable
   @Experimental // non-standard
   CssStyleSheet createCssStyleSheet(String title, String media) native;
 
   @DomName('DOMImplementation.createDocument')
   @DocsEditable
   Document createDocument(String namespaceURI, String qualifiedName, DocumentType doctype) native;
@@ skipping 11 matching lines @@
   @DocsEditable
   bool hasFeature(String feature, String version) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DOMParser')
-class DomParser native "DOMParser" {
+class DomParser extends Interceptor native "DOMParser" {
 
   @DomName('DOMParser.DOMParser')
   @DocsEditable
   factory DomParser() {
     return DomParser._create_1();
   }
   static DomParser _create_1() => JS('DomParser', 'new DOMParser()');
 
   @DomName('DOMParser.parseFromString')
   @DocsEditable
   Document parseFromString(String str, String contentType) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DOMSettableTokenList')
 class DomSettableTokenList extends DomTokenList native "DOMSettableTokenList" {
+  // To suppress missing implicit constructor warnings.
+  factory DomSettableTokenList._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('DOMSettableTokenList.value')
   @DocsEditable
   String value;
 
   @DomName('DOMSettableTokenList.__getter__')
   @DocsEditable
   String __getter__(int index) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
@@ skipping 60 matching lines @@
   @DomName('DOMStringList.item')
   @DocsEditable
   String item(int index) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('DOMStringMap')
-abstract class DomStringMap {
+abstract class DomStringMap extends Interceptor {
 
   bool __delete__(String name);
 
   String __getter__(String name);
 
   void __setter__(String name, String value);
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DOMTokenList')
-class DomTokenList native "DOMTokenList" {
+class DomTokenList extends Interceptor native "DOMTokenList" {
 
   @DomName('DOMTokenList.length')
   @DocsEditable
   final int length;
 
   @DomName('DOMTokenList.contains')
   @DocsEditable
   bool contains(String token) native;
 
   @DomName('DOMTokenList.item')
@@ skipping 771 matching lines @@
   @Experimental
   bool get isTemplate => tagName == 'TEMPLATE' || _isAttributeTemplate;
 
   void _ensureTemplate() {
     if (!isTemplate) {
       throw new UnsupportedError('$this is not a template.');
     }
     TemplateElement.decorate(this);
   }
 
+  // To suppress missing implicit constructor warnings.
+  factory Element._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('Element.abortEvent')
   @DocsEditable
   static const EventStreamProvider<Event> abortEvent = const EventStreamProvider<Event>('abort');
 
   @DomName('Element.beforecopyEvent')
   @DocsEditable
   static const EventStreamProvider<Event> beforeCopyEvent = const EventStreamProvider<Event>('beforecopy');
 
   @DomName('Element.beforecutEvent')
@@ skipping 926 matching lines @@
   /// Attempt to align the element to the bottom of the scrollable area.
   static const BOTTOM = const ScrollAlignment._internal('BOTTOM');
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('ElementTimeControl')
 @Unstable
-abstract class ElementTimeControl {
+abstract class ElementTimeControl extends Interceptor {
 
   void beginElement();
 
   void beginElementAt(num offset);
 
   void endElement();
 
   void endElementAt(num offset);
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('ElementTraversal')
 @Unstable
-abstract class ElementTraversal {
+abstract class ElementTraversal extends Interceptor {
 
   int $dom_childElementCount;
 
   Element $dom_firstElementChild;
 
   Element $dom_lastElementChild;
 
   Element nextElementSibling;
 
   Element previousElementSibling;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLEmbedElement')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.IE)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Unstable
 class EmbedElement extends _HTMLElement native "HTMLEmbedElement" {
+  // To suppress missing implicit constructor warnings.
+  factory EmbedElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLEmbedElement.HTMLEmbedElement')
   @DocsEditable
   factory EmbedElement() => document.$dom_createElement("embed");
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => Element.isTagSupported('embed');
 
   @DomName('HTMLEmbedElement.align')
   @DocsEditable
@@ skipping 42 matching lines @@
 typedef void _EntriesCallback(List<Entry> entries);
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Entry')
 // http://www.w3.org/TR/file-system-api/#the-entry-interface
 @Experimental
-class Entry native "Entry" {
+class Entry extends Interceptor native "Entry" {
 
   @DomName('Entry.filesystem')
   @DocsEditable
   final FileSystem filesystem;
 
   @DomName('Entry.fullPath')
   @DocsEditable
   final String fullPath;
 
   @DomName('Entry.isDirectory')
@@ skipping 117 matching lines @@
 typedef void _ErrorCallback(FileError error);
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('ErrorEvent')
 @Unstable
 class ErrorEvent extends Event native "ErrorEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory ErrorEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('ErrorEvent.filename')
   @DocsEditable
   final String filename;
 
   @DomName('ErrorEvent.lineno')
   @DocsEditable
   final int lineno;
 
   @DomName('ErrorEvent.message')
   @DocsEditable
   final String message;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // WARNING: Do not edit - generated code.
 
 
 @DomName('Event')
-class Event native "Event" {
+class Event extends Interceptor native "Event" {
   // In JS, canBubble and cancelable are technically required parameters to
   // init*Event. In practice, though, if they aren't provided they simply
   // default to false (since that's Boolean(undefined)).
   //
   // Contrary to JS, we default canBubble and cancelable to true, since that's
   // what people want most of the time anyway.
   factory Event(String type,
       {bool canBubble: true, bool cancelable: true}) {
     return new Event.eventType('Event', type, canBubble: canBubble,
         cancelable: cancelable);
@@ skipping 210 matching lines @@
 
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('EventException')
 @Unstable
-class EventException native "EventException" {
+class EventException extends Interceptor native "EventException" {
 
   @DomName('EventException.DISPATCH_REQUEST_ERR')
   @DocsEditable
   static const int DISPATCH_REQUEST_ERR = 1;
 
   @DomName('EventException.UNSPECIFIED_EVENT_TYPE_ERR')
   @DocsEditable
   static const int UNSPECIFIED_EVENT_TYPE_ERR = 0;
 
   @DomName('EventException.code')
@@ skipping 22 matching lines @@
 @DomName('EventSource')
 // http://www.w3.org/TR/eventsource/#the-eventsource-interface
 @Experimental // stable
 class EventSource extends EventTarget native "EventSource" {
   factory EventSource(String title, {withCredentials: false}) {
     var parsedOptions = {
       'withCredentials': withCredentials,
     };
     return EventSource._factoryEventSource(title, parsedOptions);
   }
+  // To suppress missing implicit constructor warnings.
+  factory EventSource._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('EventSource.errorEvent')
   @DocsEditable
   static const EventStreamProvider<Event> errorEvent = const EventStreamProvider<Event>('error');
 
   @DomName('EventSource.messageEvent')
   @DocsEditable
   static const EventStreamProvider<MessageEvent> messageEvent = const EventStreamProvider<MessageEvent>('message');
 
   @DomName('EventSource.openEvent')
@@ skipping 119 matching lines @@
 }
 
 /**
  * Base class for all browser objects that support events.
  *
  * Use the [on] property to add, and remove events (rather than
  * [$dom_addEventListener] and [$dom_removeEventListener]
  * for compile-time type checks and a more concise API.
  */
 @DomName('EventTarget')
-class EventTarget native "EventTarget" {
+class EventTarget extends Interceptor native "EventTarget" {
 
   /**
    * This is an ease-of-use accessor for event streams which should only be
    * used when an explicit accessor is not available.
    */
   Events get on => new Events(this);
 
   @JSName('addEventListener')
   @DomName('EventTarget.addEventListener')
   @DocsEditable
@@ skipping 11 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLFieldSetElement')
 @Unstable
 class FieldSetElement extends _HTMLElement native "HTMLFieldSetElement" {
+  // To suppress missing implicit constructor warnings.
+  factory FieldSetElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLFieldSetElement.HTMLFieldSetElement')
   @DocsEditable
   factory FieldSetElement() => document.$dom_createElement("fieldset");
 
   @DomName('HTMLFieldSetElement.disabled')
   @DocsEditable
   bool disabled;
 
   @DomName('HTMLFieldSetElement.elements')
@@ skipping 33 matching lines @@
   void setCustomValidity(String error) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('File')
 class File extends Blob native "File" {
+  // To suppress missing implicit constructor warnings.
+  factory File._() { throw new UnsupportedError("Not supported"); }
 
   DateTime get lastModifiedDate => _convertNativeToDart_DateTime(this._get_lastModifiedDate);
   @JSName('lastModifiedDate')
   @DomName('File.lastModifiedDate')
   @DocsEditable
   @Creates('Null')
   final dynamic _get_lastModifiedDate;
 
   @DomName('File.name')
   @DocsEditable
@@ skipping 22 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('FileEntry')
 // http://www.w3.org/TR/file-system-api/#the-fileentry-interface
 @Experimental
 class FileEntry extends Entry native "FileEntry" {
+  // To suppress missing implicit constructor warnings.
+  factory FileEntry._() { throw new UnsupportedError("Not supported"); }
 
   @JSName('createWriter')
   @DomName('FileEntry.createWriter')
   @DocsEditable
   void _createWriter(_FileWriterCallback successCallback, [_ErrorCallback errorCallback]) native;
 
   @JSName('createWriter')
   @DomName('FileEntry.createWriter')
   @DocsEditable
   Future<FileWriter> createWriter() {
@@ skipping 22 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('FileError')
 // http://dev.w3.org/2009/dap/file-system/pub/FileSystem/
 @Experimental
-class FileError native "FileError" {
+class FileError extends Interceptor native "FileError" {
 
   @DomName('FileError.ABORT_ERR')
   @DocsEditable
   static const int ABORT_ERR = 3;
 
   @DomName('FileError.ENCODING_ERR')
   @DocsEditable
   static const int ENCODING_ERR = 5;
 
   @DomName('FileError.INVALID_MODIFICATION_ERR')
@@ skipping 42 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('FileException')
 // http://dev.w3.org/2009/dap/file-system/pub/FileSystem/
 @Experimental
-class FileException native "FileException" {
+class FileException extends Interceptor native "FileException" {
 
   @DomName('FileException.ABORT_ERR')
   @DocsEditable
   static const int ABORT_ERR = 3;
 
   @DomName('FileException.ENCODING_ERR')
   @DocsEditable
   static const int ENCODING_ERR = 5;
 
   @DomName('FileException.INVALID_MODIFICATION_ERR')
@@ skipping 114 matching lines @@
   File item(int index) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('FileReader')
 class FileReader extends EventTarget native "FileReader" {
+  // To suppress missing implicit constructor warnings.
+  factory FileReader._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('FileReader.abortEvent')
   @DocsEditable
   static const EventStreamProvider<ProgressEvent> abortEvent = const EventStreamProvider<ProgressEvent>('abort');
 
   @DomName('FileReader.errorEvent')
   @DocsEditable
   static const EventStreamProvider<Event> errorEvent = const EventStreamProvider<Event>('error');
 
   @DomName('FileReader.loadEvent')
@@ skipping 108 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DOMFileSystem')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @Experimental
 // http://www.w3.org/TR/file-system-api/
-class FileSystem native "DOMFileSystem" {
+class FileSystem extends Interceptor native "DOMFileSystem" {
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => JS('bool', '!!(window.webkitRequestFileSystem)');
 
   @DomName('DOMFileSystem.name')
   @DocsEditable
   final String name;
 
   @DomName('DOMFileSystem.root')
   @DocsEditable
@@ skipping 13 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('FileWriter')
 // http://www.w3.org/TR/file-writer-api/#the-filewriter-interface
 @Experimental
 class FileWriter extends EventTarget native "FileWriter" {
+  // To suppress missing implicit constructor warnings.
+  factory FileWriter._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('FileWriter.abortEvent')
   @DocsEditable
   static const EventStreamProvider<ProgressEvent> abortEvent = const EventStreamProvider<ProgressEvent>('abort');
 
   @DomName('FileWriter.errorEvent')
   @DocsEditable
   static const EventStreamProvider<Event> errorEvent = const EventStreamProvider<Event>('error');
 
   @DomName('FileWriter.progressEvent')
@@ skipping 106 matching lines @@
 @Experimental
 typedef void _FileWriterCallback(FileWriter fileWriter);
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('FocusEvent')
 class FocusEvent extends UIEvent native "FocusEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory FocusEvent._() { throw new UnsupportedError("Not supported"); }
 
   EventTarget get relatedTarget => _convertNativeToDart_EventTarget(this._get_relatedTarget);
   @JSName('relatedTarget')
   @DomName('FocusEvent.relatedTarget')
   @DocsEditable
   @Creates('Null')
   final dynamic _get_relatedTarget;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('FontLoader')
 // http://www.w3.org/TR/css3-fonts/#document-fontloader
 @Experimental
 class FontLoader extends EventTarget native "FontLoader" {
+  // To suppress missing implicit constructor warnings.
+  factory FontLoader._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('FontLoader.errorEvent')
   @DocsEditable
   static const EventStreamProvider<Event> errorEvent = const EventStreamProvider<Event>('error');
 
   @DomName('FontLoader.loadEvent')
   @DocsEditable
   static const EventStreamProvider<CssFontFaceLoadEvent> loadEvent = const EventStreamProvider<CssFontFaceLoadEvent>('load');
 
   @DomName('FontLoader.loadingEvent')
@@ skipping 70 matching lines @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('FormData')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.FIREFOX)
 @SupportedBrowser(SupportedBrowser.IE, '10')
 @SupportedBrowser(SupportedBrowser.SAFARI)
-class FormData native "FormData" {
+class FormData extends Interceptor native "FormData" {
 
   @DomName('FormData.FormData')
   @DocsEditable
   factory FormData([FormElement form]) {
     if (form != null) {
       return FormData._create_1(form);
     }
     return FormData._create_2();
   }
   static FormData _create_1(form) => JS('FormData', 'new FormData(#)', form);
   static FormData _create_2() => JS('FormData', 'new FormData()');
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => JS('bool', '!!(window.FormData)');
 
   @DomName('FormData.append')
   @DocsEditable
   void append(String name, value, [String filename]) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLFormElement')
 class FormElement extends _HTMLElement native "HTMLFormElement" {
+  // To suppress missing implicit constructor warnings.
+  factory FormElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLFormElement.autocompleteEvent')
   @DocsEditable
   // http://www.whatwg.org/specs/web-apps/current-work/multipage/association-of-controls-and-forms.html#autofilling-form-controls:-the-autocomplete-attribute
   @Experimental
   static const EventStreamProvider<Event> autocompleteEvent = const EventStreamProvider<Event>('autocomplete');
 
   @DomName('HTMLFormElement.autocompleteerrorEvent')
   @DocsEditable
   // http://www.whatwg.org/specs/web-apps/current-work/multipage/association-of-controls-and-forms.html#autofilling-form-controls:-the-autocomplete-attribute
@@ skipping 82 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Gamepad')
 // https://dvcs.w3.org/hg/gamepad/raw-file/default/gamepad.html#gamepad-interface
 @Experimental
-class Gamepad native "Gamepad" {
+class Gamepad extends Interceptor native "Gamepad" {
 
   @DomName('Gamepad.axes')
   @DocsEditable
   final List<num> axes;
 
   @DomName('Gamepad.buttons')
   @DocsEditable
   final List<num> buttons;
 
   @DomName('Gamepad.id')
   @DocsEditable
   final String id;
 
   @DomName('Gamepad.index')
   @DocsEditable
   final int index;
 
   @DomName('Gamepad.timestamp')
   @DocsEditable
   final int timestamp;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Geolocation')
 @Unstable
-class Geolocation native "Geolocation" {
+class Geolocation extends Interceptor native "Geolocation" {
 
   @DomName('Geolocation.getCurrentPosition')
   Future<Geoposition> getCurrentPosition({bool enableHighAccuracy,
       Duration timeout, Duration maximumAge}) {
     var options = {};
     if (enableHighAccuracy != null) {
       options['enableHighAccuracy'] = enableHighAccuracy;
     }
     if (timeout != null) {
       options['timeout'] = timeout.inMilliseconds;
@@ skipping 96 matching lines @@
 
 
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Geoposition')
 @Unstable
-class Geoposition native "Geoposition" {
+class Geoposition extends Interceptor native "Geoposition" {
 
   @DomName('Geoposition.coords')
   @DocsEditable
   final Coordinates coords;
 
   @DomName('Geoposition.timestamp')
   @DocsEditable
   final int timestamp;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 /**
  * An `<hr>` tag.
  */
 @DomName('HTMLHRElement')
 class HRElement extends _HTMLElement native "HTMLHRElement" {
+  // To suppress missing implicit constructor warnings.
+  factory HRElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLHRElement.HTMLHRElement')
   @DocsEditable
   factory HRElement() => document.$dom_createElement("hr");
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // WARNING: Do not edit - generated code.
 
 @DomName('HashChangeEvent')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.FIREFOX)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Unstable
-
 class HashChangeEvent extends Event native "HashChangeEvent" {
   factory HashChangeEvent(String type,
       {bool canBubble: true, bool cancelable: true, String oldUrl,
       String newUrl}) {
     var event = document.$dom_createEvent("HashChangeEvent");
     event.$dom_initHashChangeEvent(type, canBubble, cancelable, oldUrl, newUrl);
     return event;
   }
+  // To suppress missing implicit constructor warnings.
+  factory HashChangeEvent._() { throw new UnsupportedError("Not supported"); }
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => Device.isEventTypeSupported('HashChangeEvent');
 
   @JSName('newURL')
   @DomName('HashChangeEvent.newURL')
   @DocsEditable
   final String newUrl;
 
   @JSName('oldURL')
   @DomName('HashChangeEvent.oldURL')
   @DocsEditable
   final String oldUrl;
 
   @JSName('initHashChangeEvent')
   @DomName('HashChangeEvent.initHashChangeEvent')
   @DocsEditable
   void $dom_initHashChangeEvent(String type, bool canBubble, bool cancelable, String oldURL, String newURL) native;
 
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLHeadElement')
 class HeadElement extends _HTMLElement native "HTMLHeadElement" {
+  // To suppress missing implicit constructor warnings.
+  factory HeadElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLHeadElement.HTMLHeadElement')
   @DocsEditable
   factory HeadElement() => document.$dom_createElement("head");
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLHeadingElement')
 class HeadingElement extends _HTMLElement native "HTMLHeadingElement" {
+  // To suppress missing implicit constructor warnings.
+  factory HeadingElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLHeadingElement.HTMLHeadingElement')
   @DocsEditable
   factory HeadingElement.h1() => document.$dom_createElement("h1");
 
   @DomName('HTMLHeadingElement.HTMLHeadingElement')
   @DocsEditable
   factory HeadingElement.h2() => document.$dom_createElement("h2");
 
   @DomName('HTMLHeadingElement.HTMLHeadingElement')
@@ skipping 11 matching lines @@
   @DomName('HTMLHeadingElement.HTMLHeadingElement')
   @DocsEditable
   factory HeadingElement.h6() => document.$dom_createElement("h6");
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('History')
-class History implements HistoryBase native "History" {
+class History extends Interceptor implements HistoryBase native "History" {
 
   /**
    * Checks if the State APIs are supported on the current platform.
    *
    * See also:
    *
    * * [pushState]
    * * [replaceState]
    * * [state]
    */
@@ skipping 187 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // WARNING: Do not edit - generated code.
 
 
 @DomName('HTMLDocument')
 class HtmlDocument extends Document native "HTMLDocument" {
+  // To suppress missing implicit constructor warnings.
+  factory HtmlDocument._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLDocument.activeElement')
   @DocsEditable
   final Element activeElement;
 
 
   @DomName('Document.body')
   BodyElement body;
 
   @DomName('Document.caretRangeFromPoint')
@@ skipping 142 matching lines @@
   Document _templateContentsOwner;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLHtmlElement')
 class HtmlElement extends _HTMLElement native "HTMLHtmlElement" {
+  // To suppress missing implicit constructor warnings.
+  factory HtmlElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLHtmlElement.HTMLHtmlElement')
   @DocsEditable
   factory HtmlElement() => document.$dom_createElement("html");
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLFormControlsCollection')
 class HtmlFormControlsCollection extends HtmlCollection native "HTMLFormControlsCollection" {
+  // To suppress missing implicit constructor warnings.
+  factory HtmlFormControlsCollection._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLFormControlsCollection.__getter__')
   @DocsEditable
   Node __getter__(int index) native;
 
   @DomName('HTMLFormControlsCollection.namedItem')
   @DocsEditable
   Node namedItem(String name) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLOptionsCollection')
 class HtmlOptionsCollection extends HtmlCollection native "HTMLOptionsCollection" {
+  // To suppress missing implicit constructor warnings.
+  factory HtmlOptionsCollection._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 /**
  * A utility for retrieving data from a URL.
  *
  * HttpRequest can be used to obtain data from http, ftp, and file
@@ skipping 154 matching lines @@
 
   /**
    * Checks to see if the overrideMimeType method is supported on the current
    * platform.
    */
   static bool get supportsOverrideMimeType {
     var xhr = new HttpRequest();
     return JS('bool', '("overrideMimeType" in #)', xhr);
   }
 
+  // To suppress missing implicit constructor warnings.
+  factory HttpRequest._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('XMLHttpRequest.abortEvent')
   @DocsEditable
   static const EventStreamProvider<ProgressEvent> abortEvent = const EventStreamProvider<ProgressEvent>('abort');
 
   @DomName('XMLHttpRequest.errorEvent')
   @DocsEditable
   static const EventStreamProvider<ProgressEvent> errorEvent = const EventStreamProvider<ProgressEvent>('error');
 
   @DomName('XMLHttpRequest.loadEvent')
@@ skipping 345 matching lines @@
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('XMLHttpRequestProgressEvent')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 @Experimental // nonstandard
 class HttpRequestProgressEvent extends ProgressEvent native "XMLHttpRequestProgressEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory HttpRequestProgressEvent._() { throw new UnsupportedError("Not supported"); }
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => Device.isEventTypeSupported('XMLHttpRequestProgressEvent');
 
   @DomName('XMLHttpRequestProgressEvent.position')
   @DocsEditable
   final int position;
 
   @DomName('XMLHttpRequestProgressEvent.totalSize')
   @DocsEditable
   final int totalSize;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('XMLHttpRequestUpload')
 // http://xhr.spec.whatwg.org/#xmlhttprequestupload
 @Experimental
 class HttpRequestUpload extends EventTarget native "XMLHttpRequestUpload,XMLHttpRequestEventTarget" {
+  // To suppress missing implicit constructor warnings.
+  factory HttpRequestUpload._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('XMLHttpRequestUpload.abortEvent')
   @DocsEditable
   static const EventStreamProvider<ProgressEvent> abortEvent = const EventStreamProvider<ProgressEvent>('abort');
 
   @DomName('XMLHttpRequestUpload.errorEvent')
   @DocsEditable
   static const EventStreamProvider<ProgressEvent> errorEvent = const EventStreamProvider<ProgressEvent>('error');
 
   @DomName('XMLHttpRequestUpload.loadEvent')
@@ skipping 51 matching lines @@
   Stream<ProgressEvent> get onProgress => progressEvent.forTarget(this);
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLIFrameElement')
 class IFrameElement extends _HTMLElement native "HTMLIFrameElement" {
+  // To suppress missing implicit constructor warnings.
+  factory IFrameElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLIFrameElement.HTMLIFrameElement')
   @DocsEditable
   factory IFrameElement() => document.$dom_createElement("iframe");
 
   WindowBase get contentWindow => _convertNativeToDart_Window(this._get_contentWindow);
   @JSName('contentWindow')
   @DomName('HTMLIFrameElement.contentWindow')
   @DocsEditable
   @Creates('Window|=Object')
@@ skipping 26 matching lines @@
 
   @DomName('HTMLIFrameElement.width')
   @DocsEditable
   String width;
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 @DomName('ImageData')
-
-class ImageData native "ImageData" {
+class ImageData extends Interceptor native "ImageData" {
 
 
   @DomName('ImageData.data')
   @DocsEditable
   final List<int> data;
 
   @DomName('ImageData.height')
   @DocsEditable
   final int height;
 
   @DomName('ImageData.width')
   @DocsEditable
   final int width;
 
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('HTMLImageElement')
 class ImageElement extends _HTMLElement implements CanvasImageSource native "HTMLImageElement" {
+  // To suppress missing implicit constructor warnings.
+  factory ImageElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLImageElement.HTMLImageElement')
   @DocsEditable
   factory ImageElement({String src, int width, int height}) {
     var e = document.$dom_createElement("img");
     if (src != null) e.src = src;
     if (width != null) e.width = width;
     if (height != null) e.height = height;
     return e;
   }
@@ skipping 93 matching lines @@
     var e = document.$dom_createElement("input");
     if (type != null) {
       try {
         // IE throws an exception for unknown types.
         e.type = type;
       } catch(_) {}
     }
     return e;
   }
 
+  // To suppress missing implicit constructor warnings.
+  factory InputElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLInputElement.webkitSpeechChangeEvent')
   @DocsEditable
   @SupportedBrowser(SupportedBrowser.CHROME)
   @SupportedBrowser(SupportedBrowser.SAFARI)
   @Experimental
   // http://lists.w3.org/Archives/Public/public-xg-htmlspeech/2011Feb/att-0020/api-draft.html#extending_html_elements
   static const EventStreamProvider<Event> speechChangeEvent = const EventStreamProvider<Event>('webkitSpeechChange');
 
   @DomName('HTMLInputElement.accept')
@@ skipping 827 matching lines @@
 
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('InputMethodContext')
 // http://www.w3.org/TR/ime-api/#idl-def-InputMethodContext
 @Experimental
-class InputMethodContext native "InputMethodContext" {
+class InputMethodContext extends Interceptor native "InputMethodContext" {
 
   @DomName('InputMethodContext.composition')
   @DocsEditable
   final Composition composition;
 
   @DomName('InputMethodContext.enabled')
   @DocsEditable
   bool enabled;
 
   @DomName('InputMethodContext.locale')
@@ skipping 65 matching lines @@
           type, canBubble, cancelable, view, keyIdentifier, keyLocation,
           ctrlKey, altKey, shiftKey, metaKey, altGraphKey);
     }
   }
 
   @DomName('KeyboardEvent.keyCode')
   int get keyCode => $dom_keyCode;
 
   @DomName('KeyboardEvent.charCode')
   int get charCode => $dom_charCode;
+  // To suppress missing implicit constructor warnings.
+  factory KeyboardEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('KeyboardEvent.altGraphKey')
   @DocsEditable
   @Experimental // nonstandard
   final bool altGraphKey;
 
   @DomName('KeyboardEvent.altKey')
   @DocsEditable
   final bool altKey;
 
@@ skipping 26 matching lines @@
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLKeygenElement')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-button-element.html#the-keygen-element
 class KeygenElement extends _HTMLElement native "HTMLKeygenElement" {
+  // To suppress missing implicit constructor warnings.
+  factory KeygenElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLKeygenElement.HTMLKeygenElement')
   @DocsEditable
   factory KeygenElement() => document.$dom_createElement("keygen");
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => Element.isTagSupported('keygen') && (new Element.tag('keygen') is KeygenElement);
 
   @DomName('HTMLKeygenElement.autofocus')
   @DocsEditable
@@ skipping 51 matching lines @@
   void setCustomValidity(String error) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLLIElement')
 class LIElement extends _HTMLElement native "HTMLLIElement" {
+  // To suppress missing implicit constructor warnings.
+  factory LIElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLLIElement.HTMLLIElement')
   @DocsEditable
   factory LIElement() => document.$dom_createElement("li");
 
   @DomName('HTMLLIElement.type')
   @DocsEditable
   // http://www.whatwg.org/specs/web-apps/current-work/multipage/obsolete.html#HTMLLIElement-partial
   @deprecated // deprecated
   String type;
 
   @DomName('HTMLLIElement.value')
   @DocsEditable
   int value;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLLabelElement')
 class LabelElement extends _HTMLElement native "HTMLLabelElement" {
+  // To suppress missing implicit constructor warnings.
+  factory LabelElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLLabelElement.HTMLLabelElement')
   @DocsEditable
   factory LabelElement() => document.$dom_createElement("label");
 
   @DomName('HTMLLabelElement.control')
   @DocsEditable
   final Element control;
 
   @DomName('HTMLLabelElement.form')
   @DocsEditable
   final FormElement form;
 
   @DomName('HTMLLabelElement.htmlFor')
   @DocsEditable
   String htmlFor;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLLegendElement')
 class LegendElement extends _HTMLElement native "HTMLLegendElement" {
+  // To suppress missing implicit constructor warnings.
+  factory LegendElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLLegendElement.HTMLLegendElement')
   @DocsEditable
   factory LegendElement() => document.$dom_createElement("legend");
 
   @DomName('HTMLLegendElement.form')
   @DocsEditable
   final FormElement form;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLLinkElement')
 class LinkElement extends _HTMLElement native "HTMLLinkElement" {
+  // To suppress missing implicit constructor warnings.
+  factory LinkElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLLinkElement.HTMLLinkElement')
   @DocsEditable
   factory LinkElement() => document.$dom_createElement("link");
 
   @DomName('HTMLLinkElement.disabled')
   @DocsEditable
   bool disabled;
 
   @DomName('HTMLLinkElement.href')
@@ skipping 30 matching lines @@
   @DocsEditable
   String type;
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Location')
-class Location implements LocationBase native "Location" {
+class Location extends Interceptor implements LocationBase native "Location" {
 
   @DomName('Location.ancestorOrigins')
   @DocsEditable
   @Experimental // nonstandard
   @Returns('DomStringList')
   @Creates('DomStringList')
   final List<String> ancestorOrigins;
 
   @DomName('Location.hash')
   @DocsEditable
@@ skipping 64 matching lines @@
 @Experimental
 typedef void MidiErrorCallback(DomError error);
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLMapElement')
 class MapElement extends _HTMLElement native "HTMLMapElement" {
+  // To suppress missing implicit constructor warnings.
+  factory MapElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLMapElement.HTMLMapElement')
   @DocsEditable
   factory MapElement() => document.$dom_createElement("map");
 
   @DomName('HTMLMapElement.areas')
   @DocsEditable
   final HtmlCollection areas;
 
   @DomName('HTMLMapElement.name')
   @DocsEditable
   String name;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MediaController')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#mediacontroller
 @Experimental
 class MediaController extends EventTarget native "MediaController" {
+  // To suppress missing implicit constructor warnings.
+  factory MediaController._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('MediaController.MediaController')
   @DocsEditable
   factory MediaController() {
     return MediaController._create_1();
   }
   static MediaController _create_1() => JS('MediaController', 'new MediaController()');
 
   @DomName('MediaController.buffered')
   @DocsEditable
@@ skipping 67 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLMediaElement')
 @Unstable
 class MediaElement extends _HTMLElement native "HTMLMediaElement" {
+  // To suppress missing implicit constructor warnings.
+  factory MediaElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLMediaElement.canplayEvent')
   @DocsEditable
   static const EventStreamProvider<Event> canPlayEvent = const EventStreamProvider<Event>('canplay');
 
   @DomName('HTMLMediaElement.canplaythroughEvent')
   @DocsEditable
   static const EventStreamProvider<Event> canPlayThroughEvent = const EventStreamProvider<Event>('canplaythrough');
 
   @DomName('HTMLMediaElement.durationchangeEvent')
@@ skipping 467 matching lines @@
   Stream<MediaKeyEvent> get onNeedKey => needKeyEvent.forTarget(this);
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MediaError')
 @Unstable
-class MediaError native "MediaError" {
+class MediaError extends Interceptor native "MediaError" {
 
   @DomName('MediaError.MEDIA_ERR_ABORTED')
   @DocsEditable
   static const int MEDIA_ERR_ABORTED = 1;
 
   @DomName('MediaError.MEDIA_ERR_DECODE')
   @DocsEditable
   static const int MEDIA_ERR_DECODE = 3;
 
   @DomName('MediaError.MEDIA_ERR_ENCRYPTED')
@@ skipping 16 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MediaKeyError')
 // https://dvcs.w3.org/hg/html-media/raw-file/eme-v0.1/encrypted-media/encrypted-media.html#error-codes
 @Experimental
-class MediaKeyError native "MediaKeyError" {
+class MediaKeyError extends Interceptor native "MediaKeyError" {
 
   @DomName('MediaKeyError.MEDIA_KEYERR_CLIENT')
   @DocsEditable
   static const int MEDIA_KEYERR_CLIENT = 2;
 
   @DomName('MediaKeyError.MEDIA_KEYERR_DOMAIN')
   @DocsEditable
   static const int MEDIA_KEYERR_DOMAIN = 6;
 
   @DomName('MediaKeyError.MEDIA_KEYERR_HARDWARECHANGE')
@@ skipping 24 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MediaKeyEvent')
 // https://dvcs.w3.org/hg/html-media/raw-file/eme-v0.1/encrypted-media/encrypted-media.html#event-definitions
 @Experimental
 class MediaKeyEvent extends Event native "MediaKeyEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory MediaKeyEvent._() { throw new UnsupportedError("Not supported"); }
 
   @JSName('defaultURL')
   @DomName('MediaKeyEvent.defaultURL')
   @DocsEditable
   final String defaultUrl;
 
   @DomName('MediaKeyEvent.errorCode')
   @DocsEditable
   final MediaKeyError errorCode;
 
@@ skipping 20 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MediaKeyMessageEvent')
 // https://dvcs.w3.org/hg/html-media/raw-file/eme-v0.1/encrypted-media/encrypted-media.html#dom-mediakeymessageevent
 @Experimental
 class MediaKeyMessageEvent extends Event native "MediaKeyMessageEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory MediaKeyMessageEvent._() { throw new UnsupportedError("Not supported"); }
 
   @JSName('destinationURL')
   @DomName('MediaKeyMessageEvent.destinationURL')
   @DocsEditable
   final String destinationUrl;
 
   @DomName('MediaKeyMessageEvent.message')
   @DocsEditable
   final Uint8List message;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MediaKeyNeededEvent')
 // https://dvcs.w3.org/hg/html-media/raw-file/eme-v0.1/encrypted-media/encrypted-media.html#dom-mediakeyneededevent
 @Experimental
 class MediaKeyNeededEvent extends Event native "MediaKeyNeededEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory MediaKeyNeededEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('MediaKeyNeededEvent.initData')
   @DocsEditable
   final Uint8List initData;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MediaKeySession')
 // https://dvcs.w3.org/hg/html-media/raw-file/eme-v0.1/encrypted-media/encrypted-media.html#dom-mediakeysession
 @Experimental
 class MediaKeySession extends EventTarget native "MediaKeySession" {
+  // To suppress missing implicit constructor warnings.
+  factory MediaKeySession._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('MediaKeySession.webkitkeyaddedEvent')
   @DocsEditable
   @SupportedBrowser(SupportedBrowser.CHROME)
   @SupportedBrowser(SupportedBrowser.SAFARI)
   @Experimental
   static const EventStreamProvider<MediaKeyEvent> keyAddedEvent = const EventStreamProvider<MediaKeyEvent>('webkitkeyadded');
 
   @DomName('MediaKeySession.webkitkeyerrorEvent')
   @DocsEditable
@@ skipping 57 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MediaKeys')
 // https://dvcs.w3.org/hg/html-media/raw-file/eme-v0.1/encrypted-media/encrypted-media.html
 @Experimental
-class MediaKeys native "MediaKeys" {
+class MediaKeys extends Interceptor native "MediaKeys" {
 
   @DomName('MediaKeys.MediaKeys')
   @DocsEditable
   factory MediaKeys(String keySystem) {
     return MediaKeys._create_1(keySystem);
   }
   static MediaKeys _create_1(keySystem) => JS('MediaKeys', 'new MediaKeys(#)', keySystem);
 
   @DomName('MediaKeys.keySystem')
   @DocsEditable
   final String keySystem;
 
   @DomName('MediaKeys.createSession')
   @DocsEditable
   MediaKeySession createSession(String type, Uint8List initData) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MediaList')
 @Unstable
-class MediaList native "MediaList" {
+class MediaList extends Interceptor native "MediaList" {
 
   @DomName('MediaList.length')
   @DocsEditable
   final int length;
 
   @DomName('MediaList.mediaText')
   @DocsEditable
   String mediaText;
 
   @DomName('MediaList.appendMedium')
   @DocsEditable
   void appendMedium(String newMedium) native;
 
   @DomName('MediaList.deleteMedium')
   @DocsEditable
   void deleteMedium(String oldMedium) native;
 
   @DomName('MediaList.item')
   @DocsEditable
   String item(int index) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MediaQueryList')
 @Unstable
-class MediaQueryList native "MediaQueryList" {
+class MediaQueryList extends Interceptor native "MediaQueryList" {
 
   @DomName('MediaQueryList.matches')
   @DocsEditable
   final bool matches;
 
   @DomName('MediaQueryList.media')
   @DocsEditable
   final String media;
 
   @DomName('MediaQueryList.addListener')
   @DocsEditable
   void addListener(MediaQueryListListener listener) native;
 
   @DomName('MediaQueryList.removeListener')
   @DocsEditable
   void removeListener(MediaQueryListListener listener) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('MediaQueryListListener')
 @Unstable
-abstract class MediaQueryListListener {
+abstract class MediaQueryListListener extends Interceptor {
 
   void queryChanged(MediaQueryList list);
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('WebKitMediaSource')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 // https://dvcs.w3.org/hg/html-media/raw-file/tip/media-source/media-source.html#mediasource
 class MediaSource extends EventTarget native "WebKitMediaSource" {
+  // To suppress missing implicit constructor warnings.
+  factory MediaSource._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('WebKitMediaSource.WebKitMediaSource')
   @DocsEditable
   factory MediaSource() {
     return MediaSource._create_1();
   }
   static MediaSource _create_1() => JS('MediaSource', 'new WebKitMediaSource()');
 
   @DomName('WebKitMediaSource.activeSourceBuffers')
   @DocsEditable
@@ skipping 44 matching lines @@
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('MediaStream')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @Experimental
 // http://dev.w3.org/2011/webrtc/editor/getusermedia.html#mediastream
 class MediaStream extends EventTarget native "MediaStream" {
+  // To suppress missing implicit constructor warnings.
+  factory MediaStream._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('MediaStream.addtrackEvent')
   @DocsEditable
   static const EventStreamProvider<Event> addTrackEvent = const EventStreamProvider<Event>('addtrack');
 
   @DomName('MediaStream.endedEvent')
   @DocsEditable
   static const EventStreamProvider<Event> endedEvent = const EventStreamProvider<Event>('ended');
 
   @DomName('MediaStream.removetrackEvent')
@@ skipping 101 matching lines @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MediaStreamEvent')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @Experimental
 // http://dev.w3.org/2011/webrtc/editor/getusermedia.html
 class MediaStreamEvent extends Event native "MediaStreamEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory MediaStreamEvent._() { throw new UnsupportedError("Not supported"); }
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => Device.isEventTypeSupported('MediaStreamEvent');
 
   @DomName('MediaStreamEvent.stream')
   @DocsEditable
   final MediaStream stream;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MediaStreamTrack')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @Experimental
 // http://dev.w3.org/2011/webrtc/editor/getusermedia.html#mediastreamtrack
 class MediaStreamTrack extends EventTarget native "MediaStreamTrack" {
+  // To suppress missing implicit constructor warnings.
+  factory MediaStreamTrack._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('MediaStreamTrack.endedEvent')
   @DocsEditable
   static const EventStreamProvider<Event> endedEvent = const EventStreamProvider<Event>('ended');
 
   @DomName('MediaStreamTrack.muteEvent')
   @DocsEditable
   static const EventStreamProvider<Event> muteEvent = const EventStreamProvider<Event>('mute');
 
   @DomName('MediaStreamTrack.unmuteEvent')
@@ skipping 50 matching lines @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MediaStreamTrackEvent')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @Experimental
 // http://dev.w3.org/2011/webrtc/editor/getusermedia.html
 class MediaStreamTrackEvent extends Event native "MediaStreamTrackEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory MediaStreamTrackEvent._() { throw new UnsupportedError("Not supported"); }
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => Device.isEventTypeSupported('MediaStreamTrackEvent');
 
   @DomName('MediaStreamTrackEvent.track')
   @DocsEditable
   final MediaStreamTrack track;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MemoryInfo')
 @Experimental // nonstandard
-class MemoryInfo native "MemoryInfo" {
+class MemoryInfo extends Interceptor native "MemoryInfo" {
 
   @DomName('MemoryInfo.jsHeapSizeLimit')
   @DocsEditable
   final int jsHeapSizeLimit;
 
   @DomName('MemoryInfo.totalJSHeapSize')
   @DocsEditable
   final int totalJSHeapSize;
 
   @DomName('MemoryInfo.usedJSHeapSize')
@@ skipping 11 matching lines @@
  *
  * A <menu> element represents an unordered list of menu commands.
  *
  * See also:
  *
  *  * [Menu Element](https://developer.mozilla.org/en-US/docs/HTML/Element/menu) from MDN.
  *  * [Menu Element](http://www.w3.org/TR/html5/the-menu-element.html#the-menu-element) from the W3C.
  */
 @DomName('HTMLMenuElement')
 class MenuElement extends _HTMLElement native "HTMLMenuElement" {
+  // To suppress missing implicit constructor warnings.
+  factory MenuElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLMenuElement.HTMLMenuElement')
   @DocsEditable
   factory MenuElement() => document.$dom_createElement("menu");
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MessageChannel')
 @Unstable
-class MessageChannel native "MessageChannel" {
+class MessageChannel extends Interceptor native "MessageChannel" {
 
   @DomName('MessageChannel.MessageChannel')
   @DocsEditable
   factory MessageChannel() {
     return MessageChannel._create_1();
   }
   static MessageChannel _create_1() => JS('MessageChannel', 'new MessageChannel()');
 
   @DomName('MessageChannel.port1')
   @DocsEditable
@@ skipping 17 matching lines @@
       String origin, String lastEventId,
       Window source, List messagePorts}) {
     if (source == null) {
       source = window;
     }
     var event = document.$dom_createEvent("MessageEvent");
     event.$dom_initMessageEvent(type, canBubble, cancelable, data, origin,
         lastEventId, source, messagePorts);
     return event;
   }
+  // To suppress missing implicit constructor warnings.
+  factory MessageEvent._() { throw new UnsupportedError("Not supported"); }
 
   dynamic get data => convertNativeToDart_SerializedScriptValue(this._get_data);
   @JSName('data')
   @DomName('MessageEvent.data')
   @DocsEditable
   @annotation_Creates_SerializedScriptValue
   @annotation_Returns_SerializedScriptValue
   final dynamic _get_data;
 
   @DomName('MessageEvent.lastEventId')
@@ skipping 27 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MessagePort')
 @Unstable
 class MessagePort extends EventTarget native "MessagePort" {
+  // To suppress missing implicit constructor warnings.
+  factory MessagePort._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('MessagePort.messageEvent')
   @DocsEditable
   static const EventStreamProvider<MessageEvent> messageEvent = const EventStreamProvider<MessageEvent>('message');
 
   @JSName('addEventListener')
   @DomName('MessagePort.addEventListener')
   @DocsEditable
   void $dom_addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
@@ skipping 40 matching lines @@
   Stream<MessageEvent> get onMessage => messageEvent.forTarget(this);
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLMetaElement')
 class MetaElement extends _HTMLElement native "HTMLMetaElement" {
+  // To suppress missing implicit constructor warnings.
+  factory MetaElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLMetaElement.HTMLMetaElement')
   @DocsEditable
   factory MetaElement() => document.$dom_createElement("meta");
 
   @DomName('HTMLMetaElement.content')
   @DocsEditable
   String content;
 
   @DomName('HTMLMetaElement.httpEquiv')
   @DocsEditable
   String httpEquiv;
 
   @DomName('HTMLMetaElement.name')
   @DocsEditable
   String name;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Metadata')
 // http://www.w3.org/TR/file-system-api/#the-metadata-interface
 @Experimental
-class Metadata native "Metadata" {
+class Metadata extends Interceptor native "Metadata" {
 
   DateTime get modificationTime => _convertNativeToDart_DateTime(this._get_modificationTime);
   @JSName('modificationTime')
   @DomName('Metadata.modificationTime')
   @DocsEditable
   @Creates('Null')
   final dynamic _get_modificationTime;
 
   @DomName('Metadata.size')
   @DocsEditable
@@ skipping 15 matching lines @@
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLMeterElement')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.FIREFOX)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Unstable
 class MeterElement extends _HTMLElement native "HTMLMeterElement" {
+  // To suppress missing implicit constructor warnings.
+  factory MeterElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLMeterElement.HTMLMeterElement')
   @DocsEditable
   factory MeterElement() => document.$dom_createElement("meter");
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => Element.isTagSupported('meter');
 
   @DomName('HTMLMeterElement.high')
   @DocsEditable
@@ skipping 29 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MIDIAccess')
 // http://webaudio.github.io/web-midi-api/#midiaccess-interface
 @Experimental
 class MidiAccess extends EventTarget native "MIDIAccess" {
+  // To suppress missing implicit constructor warnings.
+  factory MidiAccess._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('MIDIAccess.connectEvent')
   @DocsEditable
   static const EventStreamProvider<MidiConnectionEvent> connectEvent = const EventStreamProvider<MidiConnectionEvent>('connect');
 
   @DomName('MIDIAccess.disconnectEvent')
   @DocsEditable
   static const EventStreamProvider<MidiConnectionEvent> disconnectEvent = const EventStreamProvider<MidiConnectionEvent>('disconnect');
 
   @JSName('addEventListener')
@@ skipping 29 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MIDIConnectionEvent')
 // http://webaudio.github.io/web-midi-api/#midiconnectionevent-interface
 @Experimental
 class MidiConnectionEvent extends Event native "MIDIConnectionEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory MidiConnectionEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('MIDIConnectionEvent.port')
   @DocsEditable
   final MidiPort port;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MIDIInput')
 // http://webaudio.github.io/web-midi-api/#idl-def-MIDIInput
 @Experimental
 class MidiInput extends MidiPort implements EventTarget native "MIDIInput" {
+  // To suppress missing implicit constructor warnings.
+  factory MidiInput._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('MIDIInput.midimessageEvent')
   @DocsEditable
   static const EventStreamProvider<MidiMessageEvent> midiMessageEvent = const EventStreamProvider<MidiMessageEvent>('midimessage');
 
   @DomName('MIDIInput.onmidimessage')
   @DocsEditable
   Stream<MidiMessageEvent> get onMidiMessage => midiMessageEvent.forTarget(this);
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MIDIMessageEvent')
 // http://webaudio.github.io/web-midi-api/#midimessageevent-interface
 @Experimental
 class MidiMessageEvent extends Event native "MIDIMessageEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory MidiMessageEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('MIDIMessageEvent.data')
   @DocsEditable
   final Uint8List data;
 
   @DomName('MIDIMessageEvent.receivedTime')
   @DocsEditable
   final num receivedTime;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MIDIOutput')
 // http://webaudio.github.io/web-midi-api/#midioutput-interface
 @Experimental
 class MidiOutput extends MidiPort native "MIDIOutput" {
+  // To suppress missing implicit constructor warnings.
+  factory MidiOutput._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('MIDIOutput.send')
   @DocsEditable
   void send(Uint8List data, [num timestamp]) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MIDIPort')
 // http://webaudio.github.io/web-midi-api/#idl-def-MIDIPort
 @Experimental
 class MidiPort extends EventTarget native "MIDIPort" {
+  // To suppress missing implicit constructor warnings.
+  factory MidiPort._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('MIDIPort.disconnectEvent')
   @DocsEditable
   static const EventStreamProvider<MidiConnectionEvent> disconnectEvent = const EventStreamProvider<MidiConnectionEvent>('disconnect');
 
   @DomName('MIDIPort.id')
   @DocsEditable
   final String id;
 
   @DomName('MIDIPort.manufacturer')
@@ skipping 31 matching lines @@
   Stream<MidiConnectionEvent> get onDisconnect => disconnectEvent.forTarget(this);
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MimeType')
 @Experimental // non-standard
-class MimeType native "MimeType" {
+class MimeType extends Interceptor native "MimeType" {
 
   @DomName('MimeType.description')
   @DocsEditable
   final String description;
 
   @DomName('MimeType.enabledPlugin')
   @DocsEditable
   final Plugin enabledPlugin;
 
   @DomName('MimeType.suffixes')
@@ skipping 76 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLModElement')
 @Unstable
 class ModElement extends _HTMLElement native "HTMLModElement" {
+  // To suppress missing implicit constructor warnings.
+  factory ModElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLModElement.cite')
   @DocsEditable
   String cite;
 
   @DomName('HTMLModElement.dateTime')
   @DocsEditable
   String dateTime;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
@@ skipping 11 matching lines @@
 
     if (view == null) {
       view = window;
     }
     var event = document.$dom_createEvent('MouseEvent');
     event.$dom_initMouseEvent(type, canBubble, cancelable, view, detail,
         screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey, metaKey,
         button, relatedTarget);
     return event;
   }
+  // To suppress missing implicit constructor warnings.
+  factory MouseEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('MouseEvent.altKey')
   @DocsEditable
   final bool altKey;
 
   @DomName('MouseEvent.button')
   @DocsEditable
   final int button;
 
   @JSName('clientX')
@@ skipping 155 matching lines @@
 class MutationEvent extends Event native "MutationEvent" {
   factory MutationEvent(String type,
       {bool canBubble: false, bool cancelable: false, Node relatedNode,
       String prevValue, String newValue, String attrName, int attrChange: 0}) {
 
     var event = document.$dom_createEvent('MutationEvent');
     event.$dom_initMutationEvent(type, canBubble, cancelable, relatedNode,
         prevValue, newValue, attrName, attrChange);
     return event;
   }
+  // To suppress missing implicit constructor warnings.
+  factory MutationEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('MutationEvent.ADDITION')
   @DocsEditable
   static const int ADDITION = 2;
 
   @DomName('MutationEvent.MODIFICATION')
   @DocsEditable
   static const int MODIFICATION = 1;
 
   @DomName('MutationEvent.REMOVAL')
@@ skipping 32 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('MutationObserver')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.FIREFOX)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
-class MutationObserver native "MutationObserver,WebKitMutationObserver" {
+class MutationObserver extends Interceptor native "MutationObserver,WebKitMutationObserver" {
 
   @DomName('MutationObserver.disconnect')
   @DocsEditable
   void disconnect() native;
 
   @DomName('MutationObserver.observe')
   @DocsEditable
   void _observe(Node target, Map options) {
     var options_1 = convertDartToNative_Dictionary(options);
     __observe_1(target, options_1);
@@ skipping 75 matching lines @@
         convertDartClosureToJS(callback, 2));
   }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('MutationRecord')
-class MutationRecord native "MutationRecord" {
+class MutationRecord extends Interceptor native "MutationRecord" {
 
   @DomName('MutationRecord.addedNodes')
   @DocsEditable
   @Returns('NodeList')
   @Creates('NodeList')
   final List<Node> addedNodes;
 
   @DomName('MutationRecord.attributeName')
   @DocsEditable
   final String attributeName;
@@ skipping 33 matching lines @@
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('WebKitNamedFlow')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 // http://www.w3.org/TR/css3-regions/#dom-named-flow-collection
 class NamedFlow extends EventTarget native "WebKitNamedFlow" {
+  // To suppress missing implicit constructor warnings.
+  factory NamedFlow._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('WebKitNamedFlow.firstEmptyRegionIndex')
   @DocsEditable
   final int firstEmptyRegionIndex;
 
   @DomName('WebKitNamedFlow.name')
   @DocsEditable
   final String name;
 
   @DomName('WebKitNamedFlow.overset')
@@ skipping 36 matching lines @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('WebKitNamedFlowCollection')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 // http://dev.w3.org/csswg/css-regions/#dom-named-flow-collection
-class NamedFlowCollection native "WebKitNamedFlowCollection" {
+class NamedFlowCollection extends Interceptor native "WebKitNamedFlowCollection" {
 
   @DomName('WebKitNamedFlowCollection.length')
   @DocsEditable
   final int length;
 
   @DomName('WebKitNamedFlowCollection.__getter__')
   @DocsEditable
   NamedFlow __getter__(String name) native;
 
   @DomName('WebKitNamedFlowCollection.item')
   @DocsEditable
   NamedFlow item(int index) native;
 
   @DomName('WebKitNamedFlowCollection.namedItem')
   @DocsEditable
   NamedFlow namedItem(String name) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('Navigator')
-class Navigator native "Navigator" {
+class Navigator extends Interceptor native "Navigator" {
 
   @DomName('Navigator.language')
   String get language => JS('String', '#.language || #.userLanguage', this,
       this);
 
   /**
    * Gets a stream (video and or audio) from the local computer.
    *
    * Use [MediaStream.supported] to check if this is supported by the current
    * platform. The arguments `audio` and `video` default to `false` (stream does
    * not use audio or video, respectively).
    *
    * Simple example usage:
    *
    *     window.navigator.getUserMedia(audio: true, video: true).then((stream) {
    *       var video = new VideoElement()
    *         ..autoplay = true
    *         ..src = Url.createObjectUrl(stream);
    *       document.body.append(video);
    *     });
    *
-   * The user can also pass in Maps to the audio or video parameters to specify 
-   * mandatory and optional constraints for the media stream. Not passing in a 
-   * map, but passing in `true` will provide a MediaStream with audio or 
+   * The user can also pass in Maps to the audio or video parameters to specify
+   * mandatory and optional constraints for the media stream. Not passing in a
+   * map, but passing in `true` will provide a MediaStream with audio or
    * video capabilities, but without any additional constraints. The particular
-   * constraint names for audio and video are still in flux, but as of this 
+   * constraint names for audio and video are still in flux, but as of this
    * writing, here is an example providing more constraints.
    *
    *     window.navigator.getUserMedia(
-   *         audio: true, 
-   *         video: {'mandatory': 
+   *         audio: true,
+   *         video: {'mandatory':
    *                    { 'minAspectRatio': 1.333, 'maxAspectRatio': 1.334 },
-   *                 'optional': 
+   *                 'optional':
    *                    [{ 'minFrameRate': 60 },
    *                     { 'maxWidth': 640 }]
    *     });
    *
    * See also:
    * * [MediaStream.supported]
    */
   @DomName('Navigator.webkitGetUserMedia')
   @SupportedBrowser(SupportedBrowser.CHROME)
   @Experimental
@@ skipping 147 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('NavigatorUserMediaError')
 // http://dev.w3.org/2011/webrtc/editor/getusermedia.html#idl-def-NavigatorUserMediaError
 @Experimental
-class NavigatorUserMediaError native "NavigatorUserMediaError" {
+class NavigatorUserMediaError extends Interceptor native "NavigatorUserMediaError" {
 
   @DomName('NavigatorUserMediaError.constraintName')
   @DocsEditable
   final String constraintName;
 
   @DomName('NavigatorUserMediaError.message')
   @DocsEditable
   final String message;
 
   @DomName('NavigatorUserMediaError.name')
@@ skipping 295 matching lines @@
   @Experimental
   void unbindAll() {
     TemplateElement.mdvPackage(this).unbindAll();
   }
 
   /** Gets the template instance that instantiated this node, if any. */
   @Experimental
   TemplateInstance get templateInstance =>
       TemplateElement.mdvPackage(this).templateInstance;
 
+  // To suppress missing implicit constructor warnings.
+  factory Node._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('Node.ATTRIBUTE_NODE')
   @DocsEditable
   static const int ATTRIBUTE_NODE = 2;
 
   @DomName('Node.CDATA_SECTION_NODE')
   @DocsEditable
   static const int CDATA_SECTION_NODE = 4;
 
   @DomName('Node.COMMENT_NODE')
@@ skipping 159 matching lines @@
 
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('NodeFilter')
 @Unstable
-class NodeFilter native "NodeFilter" {
+class NodeFilter extends Interceptor native "NodeFilter" {
 
   @DomName('NodeFilter.FILTER_ACCEPT')
   @DocsEditable
   static const int FILTER_ACCEPT = 1;
 
   @DomName('NodeFilter.FILTER_REJECT')
   @DocsEditable
   static const int FILTER_REJECT = 2;
 
   @DomName('NodeFilter.FILTER_SKIP')
@@ skipping 57 matching lines @@
   @DocsEditable
   static const int SHOW_TEXT = 0x00000004;
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('NodeIterator')
 @Unstable
-class NodeIterator native "NodeIterator" {
+class NodeIterator extends Interceptor native "NodeIterator" {
   factory NodeIterator(Node root, int whatToShow) {
     return document.$dom_createNodeIterator(root, whatToShow, null, false);
   }
 
   @DomName('NodeIterator.pointerBeforeReferenceNode')
   @DocsEditable
   final bool pointerBeforeReferenceNode;
 
   @DomName('NodeIterator.referenceNode')
   @DocsEditable
@@ skipping 85 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Notation')
 // http://dom.spec.whatwg.org/#notation
 @deprecated // deprecated
 class Notation extends Node native "Notation" {
+  // To suppress missing implicit constructor warnings.
+  factory Notation._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('Notation.publicId')
   @DocsEditable
   final String publicId;
 
   @DomName('Notation.systemId')
   @DocsEditable
   final String systemId;
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('Notification')
 // http://www.w3.org/TR/notifications/#notification
 @Experimental // experimental
 class Notification extends EventTarget native "Notification" {
 
-  factory Notification(String title, {String titleDir: null, String body: null, 
+  factory Notification(String title, {String titleDir: null, String body: null,
       String bodyDir: null, String tag: null, String iconUrl: null}) {
 
     var parsedOptions = {};
     if (titleDir != null) parsedOptions['titleDir'] = titleDir;
     if (body != null) parsedOptions['body'] = body;
     if (bodyDir != null) parsedOptions['bodyDir'] = bodyDir;
     if (tag != null) parsedOptions['tag'] = tag;
     if (iconUrl != null) parsedOptions['iconUrl'] = iconUrl;
 
     return Notification._factoryNotification(title, parsedOptions);
   }
+  // To suppress missing implicit constructor warnings.
+  factory Notification._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('Notification.clickEvent')
   @DocsEditable
   static const EventStreamProvider<Event> clickEvent = const EventStreamProvider<Event>('click');
 
   @DomName('Notification.closeEvent')
   @DocsEditable
   static const EventStreamProvider<Event> closeEvent = const EventStreamProvider<Event>('close');
 
   @DomName('Notification.displayEvent')
@@ skipping 109 matching lines @@
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('NotificationCenter')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 // http://www.w3.org/TR/notifications/#showing-a-notification
 @deprecated // deprecated
-class NotificationCenter native "NotificationCenter" {
+class NotificationCenter extends Interceptor native "NotificationCenter" {
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => JS('bool', '!!(window.webkitNotifications)');
 
   @DomName('NotificationCenter.checkPermission')
   @DocsEditable
   int checkPermission() native;
 
   @JSName('createHTMLNotification')
   @DomName('NotificationCenter.createHTMLNotification')
@@ skipping 31 matching lines @@
 @Experimental
 typedef void _NotificationPermissionCallback(String permission);
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLOListElement')
 class OListElement extends _HTMLElement native "HTMLOListElement" {
+  // To suppress missing implicit constructor warnings.
+  factory OListElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLOListElement.HTMLOListElement')
   @DocsEditable
   factory OListElement() => document.$dom_createElement("ol");
 
   @DomName('HTMLOListElement.reversed')
   @DocsEditable
   bool reversed;
 
   @DomName('HTMLOListElement.start')
   @DocsEditable
   int start;
 
   @DomName('HTMLOListElement.type')
   @DocsEditable
   String type;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLObjectElement')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.IE)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Unstable
 class ObjectElement extends _HTMLElement native "HTMLObjectElement" {
+  // To suppress missing implicit constructor warnings.
+  factory ObjectElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLObjectElement.HTMLObjectElement')
   @DocsEditable
   factory ObjectElement() => document.$dom_createElement("object");
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => Element.isTagSupported('object');
 
   @DomName('HTMLObjectElement.code')
   @DocsEditable
@@ skipping 58 matching lines @@
   void setCustomValidity(String error) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLOptGroupElement')
 class OptGroupElement extends _HTMLElement native "HTMLOptGroupElement" {
+  // To suppress missing implicit constructor warnings.
+  factory OptGroupElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLOptGroupElement.HTMLOptGroupElement')
   @DocsEditable
   factory OptGroupElement() => document.$dom_createElement("optgroup");
 
   @DomName('HTMLOptGroupElement.disabled')
   @DocsEditable
   bool disabled;
 
   @DomName('HTMLOptGroupElement.label')
   @DocsEditable
   String label;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLOptionElement')
 class OptionElement extends _HTMLElement native "HTMLOptionElement" {
+  // To suppress missing implicit constructor warnings.
+  factory OptionElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLOptionElement.HTMLOptionElement')
   @DocsEditable
   factory OptionElement([String data, String value, bool defaultSelected, bool selected]) {
     if (selected != null) {
       return OptionElement._create_1(data, value, defaultSelected, selected);
     }
     if (defaultSelected != null) {
       return OptionElement._create_2(data, value, defaultSelected);
     }
@@ skipping 43 matching lines @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLOutputElement')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.FIREFOX)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 class OutputElement extends _HTMLElement native "HTMLOutputElement" {
+  // To suppress missing implicit constructor warnings.
+  factory OutputElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLOutputElement.HTMLOutputElement')
   @DocsEditable
   factory OutputElement() => document.$dom_createElement("output");
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => Element.isTagSupported('output');
 
   @DomName('HTMLOutputElement.defaultValue')
   @DocsEditable
@@ skipping 48 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('OverflowEvent')
 @Experimental // nonstandard
 class OverflowEvent extends Event native "OverflowEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory OverflowEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('OverflowEvent.BOTH')
   @DocsEditable
   static const int BOTH = 2;
 
   @DomName('OverflowEvent.HORIZONTAL')
   @DocsEditable
   static const int HORIZONTAL = 0;
 
   @DomName('OverflowEvent.VERTICAL')
@@ skipping 15 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('PageTransitionEvent')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/history.html#pagetransitionevent
 @Experimental
 class PageTransitionEvent extends Event native "PageTransitionEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory PageTransitionEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('PageTransitionEvent.persisted')
   @DocsEditable
   final bool persisted;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLParagraphElement')
 class ParagraphElement extends _HTMLElement native "HTMLParagraphElement" {
+  // To suppress missing implicit constructor warnings.
+  factory ParagraphElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLParagraphElement.HTMLParagraphElement')
   @DocsEditable
   factory ParagraphElement() => document.$dom_createElement("p");
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLParamElement')
 @Unstable
 class ParamElement extends _HTMLElement native "HTMLParamElement" {
+  // To suppress missing implicit constructor warnings.
+  factory ParamElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLParamElement.HTMLParamElement')
   @DocsEditable
   factory ParamElement() => document.$dom_createElement("param");
 
   @DomName('HTMLParamElement.name')
   @DocsEditable
   String name;
 
   @DomName('HTMLParamElement.value')
   @DocsEditable
   String value;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Path')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#path-objects
 @Experimental
-class Path native "Path" {
+class Path extends Interceptor native "Path" {
 
   @DomName('Path.Path')
   @DocsEditable
   factory Path([path_OR_text]) {
     if (path_OR_text == null) {
       return Path._create_1();
     }
     if ((path_OR_text is Path || path_OR_text == null)) {
       return Path._create_2(path_OR_text);
     }
@@ skipping 42 matching lines @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Performance')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.FIREFOX)
 @SupportedBrowser(SupportedBrowser.IE)
 class Performance extends EventTarget native "Performance" {
+  // To suppress missing implicit constructor warnings.
+  factory Performance._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('Performance.webkitresourcetimingbufferfullEvent')
   @DocsEditable
   @SupportedBrowser(SupportedBrowser.CHROME)
   @SupportedBrowser(SupportedBrowser.SAFARI)
   @Experimental
   // http://www.w3c-test.org/webperf/specs/ResourceTiming/#performanceresourcetiming-methods
   static const EventStreamProvider<Event> resourceTimingBufferFullEvent = const EventStreamProvider<Event>('webkitresourcetimingbufferfull');
 
   /// Checks if this type is supported on the current platform.
@@ skipping 84 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('PerformanceEntry')
 // http://www.w3.org/TR/performance-timeline/#sec-PerformanceEntry-interface
 @Experimental
-class PerformanceEntry native "PerformanceEntry" {
+class PerformanceEntry extends Interceptor native "PerformanceEntry" {
 
   @DomName('PerformanceEntry.duration')
   @DocsEditable
   final num duration;
 
   @DomName('PerformanceEntry.entryType')
   @DocsEditable
   final String entryType;
 
   @DomName('PerformanceEntry.name')
   @DocsEditable
   final String name;
 
   @DomName('PerformanceEntry.startTime')
   @DocsEditable
   final num startTime;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('PerformanceMark')
 // http://www.w3.org/TR/user-timing/#performancemark
 @Experimental
 class PerformanceMark extends PerformanceEntry native "PerformanceMark" {
+  // To suppress missing implicit constructor warnings.
+  factory PerformanceMark._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('PerformanceMeasure')
 // http://www.w3.org/TR/user-timing/#performancemeasure
 @Experimental
 class PerformanceMeasure extends PerformanceEntry native "PerformanceMeasure" {
+  // To suppress missing implicit constructor warnings.
+  factory PerformanceMeasure._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('PerformanceNavigation')
 @Unstable
-class PerformanceNavigation native "PerformanceNavigation" {
+class PerformanceNavigation extends Interceptor native "PerformanceNavigation" {
 
   @DomName('PerformanceNavigation.TYPE_BACK_FORWARD')
   @DocsEditable
   static const int TYPE_BACK_FORWARD = 2;
 
   @DomName('PerformanceNavigation.TYPE_NAVIGATE')
   @DocsEditable
   static const int TYPE_NAVIGATE = 0;
 
   @DomName('PerformanceNavigation.TYPE_RELOAD')
@@ skipping 15 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('PerformanceResourceTiming')
 // http://www.w3c-test.org/webperf/specs/ResourceTiming/#performanceresourcetiming
 @Experimental
 class PerformanceResourceTiming extends PerformanceEntry native "PerformanceResourceTiming" {
+  // To suppress missing implicit constructor warnings.
+  factory PerformanceResourceTiming._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('PerformanceResourceTiming.connectEnd')
   @DocsEditable
   final num connectEnd;
 
   @DomName('PerformanceResourceTiming.connectStart')
   @DocsEditable
   final num connectStart;
 
   @DomName('PerformanceResourceTiming.domainLookupEnd')
@@ skipping 40 matching lines @@
   final num secureConnectionStart;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('PerformanceTiming')
 @Unstable
-class PerformanceTiming native "PerformanceTiming" {
+class PerformanceTiming extends Interceptor native "PerformanceTiming" {
 
   @DomName('PerformanceTiming.connectEnd')
   @DocsEditable
   final int connectEnd;
 
   @DomName('PerformanceTiming.connectStart')
   @DocsEditable
   final int connectStart;
 
   @DomName('PerformanceTiming.domComplete')
@@ skipping 73 matching lines @@
   final int unloadEventStart;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Plugin')
 @Experimental // non-standard
-class Plugin native "Plugin" {
+class Plugin extends Interceptor native "Plugin" {
 
   @DomName('Plugin.description')
   @DocsEditable
   final String description;
 
   @DomName('Plugin.filename')
   @DocsEditable
   final String filename;
 
   @DomName('Plugin.length')
@@ skipping 95 matching lines @@
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('PopStateEvent')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.FIREFOX)
 @SupportedBrowser(SupportedBrowser.IE, '10')
 @SupportedBrowser(SupportedBrowser.SAFARI)
 class PopStateEvent extends Event native "PopStateEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory PopStateEvent._() { throw new UnsupportedError("Not supported"); }
 
   dynamic get state => convertNativeToDart_SerializedScriptValue(this._get_state);
   @JSName('state')
   @DomName('PopStateEvent.state')
   @DocsEditable
   @annotation_Creates_SerializedScriptValue
   @annotation_Returns_SerializedScriptValue
   final dynamic _get_state;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // WARNING: Do not edit - generated code.
 
 
 @DomName('PositionCallback')
 @Unstable
 typedef void _PositionCallback(Geoposition position);
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('PositionError')
 @Unstable
-class PositionError native "PositionError" {
+class PositionError extends Interceptor native "PositionError" {
 
   @DomName('PositionError.PERMISSION_DENIED')
   @DocsEditable
   static const int PERMISSION_DENIED = 1;
 
   @DomName('PositionError.POSITION_UNAVAILABLE')
   @DocsEditable
   static const int POSITION_UNAVAILABLE = 2;
 
   @DomName('PositionError.TIMEOUT')
@@ skipping 19 matching lines @@
 @Unstable
 typedef void _PositionErrorCallback(PositionError error);
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLPreElement')
 class PreElement extends _HTMLElement native "HTMLPreElement" {
+  // To suppress missing implicit constructor warnings.
+  factory PreElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLPreElement.HTMLPreElement')
   @DocsEditable
   factory PreElement() => document.$dom_createElement("pre");
 
   @DomName('HTMLPreElement.wrap')
   @DocsEditable
   @deprecated // deprecated
   bool wrap;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('ProcessingInstruction')
 @Unstable
 class ProcessingInstruction extends Node native "ProcessingInstruction" {
+  // To suppress missing implicit constructor warnings.
+  factory ProcessingInstruction._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('ProcessingInstruction.data')
   @DocsEditable
   @Experimental // non-standard
   String data;
 
   @DomName('ProcessingInstruction.sheet')
   @DocsEditable
   @Experimental // non-standard
   final StyleSheet sheet;
 
   @DomName('ProcessingInstruction.target')
   @DocsEditable
   final String target;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLProgressElement')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.FIREFOX)
 @SupportedBrowser(SupportedBrowser.IE, '10')
 @SupportedBrowser(SupportedBrowser.SAFARI)
 class ProgressElement extends _HTMLElement native "HTMLProgressElement" {
+  // To suppress missing implicit constructor warnings.
+  factory ProgressElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLProgressElement.HTMLProgressElement')
   @DocsEditable
   factory ProgressElement() => document.$dom_createElement("progress");
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => Element.isTagSupported('progress');
 
   @DomName('HTMLProgressElement.labels')
   @DocsEditable
@@ skipping 15 matching lines @@
   num value;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('ProgressEvent')
 class ProgressEvent extends Event native "ProgressEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory ProgressEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('ProgressEvent.lengthComputable')
   @DocsEditable
   final bool lengthComputable;
 
   @DomName('ProgressEvent.loaded')
   @DocsEditable
   final int loaded;
 
   @DomName('ProgressEvent.total')
   @DocsEditable
   final int total;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLQuoteElement')
 class QuoteElement extends _HTMLElement native "HTMLQuoteElement" {
+  // To suppress missing implicit constructor warnings.
+  factory QuoteElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLQuoteElement.HTMLQuoteElement')
   @DocsEditable
   factory QuoteElement() => document.$dom_createElement("q");
 
   @DomName('HTMLQuoteElement.cite')
   @DocsEditable
   String cite;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
@@ skipping 31 matching lines @@
 typedef void RtcStatsCallback(RtcStatsResponse response);
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // WARNING: Do not edit - generated code.
 
 
 @DomName('Range')
 @Unstable
-class Range native "Range" {
+class Range extends Interceptor native "Range" {
   factory Range() => document.$dom_createRange();
 
   factory Range.fromPoint(Point point) =>
       document.$dom_caretRangeFromPoint(point.x, point.y);
 
   @DomName('Range.END_TO_END')
   @DocsEditable
   static const int END_TO_END = 2;
 
   @DomName('Range.END_TO_START')
@@ skipping 180 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('ResourceProgressEvent')
 // https://chromiumcodereview.appspot.com/14773025/
 @deprecated // experimental
 class ResourceProgressEvent extends ProgressEvent native "ResourceProgressEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory ResourceProgressEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('ResourceProgressEvent.url')
   @DocsEditable
   final String url;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('RTCDataChannel')
 // http://dev.w3.org/2011/webrtc/editor/webrtc.html#idl-def-RTCDataChannel
 @Experimental
 class RtcDataChannel extends EventTarget native "RTCDataChannel,DataChannel" {
+  // To suppress missing implicit constructor warnings.
+  factory RtcDataChannel._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('RTCDataChannel.closeEvent')
   @DocsEditable
   static const EventStreamProvider<Event> closeEvent = const EventStreamProvider<Event>('close');
 
   @DomName('RTCDataChannel.errorEvent')
   @DocsEditable
   static const EventStreamProvider<Event> errorEvent = const EventStreamProvider<Event>('error');
 
   @DomName('RTCDataChannel.messageEvent')
@@ skipping 65 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('RTCDataChannelEvent')
 // http://dev.w3.org/2011/webrtc/editor/webrtc.html#rtcdatachannelevent
 @Experimental
 class RtcDataChannelEvent extends Event native "RTCDataChannelEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory RtcDataChannelEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('RTCDataChannelEvent.channel')
   @DocsEditable
   final RtcDataChannel channel;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('RTCDTMFSender')
 // http://dev.w3.org/2011/webrtc/editor/webrtc.html#idl-def-RTCDTMFSender
 @Experimental
 class RtcDtmfSender extends EventTarget native "RTCDTMFSender" {
+  // To suppress missing implicit constructor warnings.
+  factory RtcDtmfSender._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('RTCDTMFSender.tonechangeEvent')
   @DocsEditable
   static const EventStreamProvider<RtcDtmfToneChangeEvent> toneChangeEvent = const EventStreamProvider<RtcDtmfToneChangeEvent>('tonechange');
 
   @JSName('canInsertDTMF')
   @DomName('RTCDTMFSender.canInsertDTMF')
   @DocsEditable
   final bool canInsertDtmf;
 
@@ skipping 39 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('RTCDTMFToneChangeEvent')
 // http://dev.w3.org/2011/webrtc/editor/webrtc.html#idl-def-RTCDTMFToneChangeEvent
 @Experimental
 class RtcDtmfToneChangeEvent extends Event native "RTCDTMFToneChangeEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory RtcDtmfToneChangeEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('RTCDTMFToneChangeEvent.tone')
   @DocsEditable
   final String tone;
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('RTCIceCandidate')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @Experimental
 // http://dev.w3.org/2011/webrtc/editor/webrtc.html#idl-def-RTCIceCandidate
-class RtcIceCandidate native "RTCIceCandidate,mozRTCIceCandidate" {
+class RtcIceCandidate extends Interceptor native "RTCIceCandidate,mozRTCIceCandidate" {
   factory RtcIceCandidate(Map dictionary) {
     // TODO(efortuna): Remove this check if when you can actually construct with
     // the unprefixed RTCIceCandidate in Firefox (currently both are defined,
     // but one can't be used as a constructor).
     var constructorName = JS('', 'window[#]',
-        Device.isFirefox ? '${Device.propertyPrefix}RTCIceCandidate' : 
+        Device.isFirefox ? '${Device.propertyPrefix}RTCIceCandidate' :
         'RTCIceCandidate');
     return JS('RtcIceCandidate', 'new #(#)', constructorName,
         convertDartToNative_SerializedScriptValue(dictionary));
   }
 
   @DomName('RTCIceCandidate.candidate')
   @DocsEditable
   final String candidate;
 
   @DomName('RTCIceCandidate.sdpMLineIndex')
   @DocsEditable
   final int sdpMLineIndex;
 
   @DomName('RTCIceCandidate.sdpMid')
   @DocsEditable
   final String sdpMid;
 
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('RTCIceCandidateEvent')
 // http://dev.w3.org/2011/webrtc/editor/webrtc.html#rtcicecandidate-type
 @Experimental
 class RtcIceCandidateEvent extends Event native "RTCIceCandidateEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory RtcIceCandidateEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('RTCIceCandidateEvent.candidate')
   @DocsEditable
   final RtcIceCandidate candidate;
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
@@ skipping 16 matching lines @@
   }
 
   /**
    * Checks if Real Time Communication (RTC) APIs are supported and enabled on
    * the current platform.
    */
   static bool get supported {
     // Currently in Firefox some of the RTC elements are defined but throw an
     // error unless the user has specifically enabled them in their
     // about:config. So we have to construct an element to actually test if RTC
-    // is supported at the given time. 
+    // is supported at the given time.
     try {
       new RtcPeerConnection(
           {"iceServers": [ {"url":"stun:localhost"}]});
       return true;
     } catch (_) { return false;}
     return false;
   }
   Future<RtcSessionDescription> createOffer([Map mediaConstraints]) {
     var completer = new Completer<RtcSessionDescription>();
     _createOffer(
         (value) { completer.complete(value); },
         (error) { completer.completeError(error); }, mediaConstraints);
     return completer.future;
   }
 
   Future<RtcSessionDescription> createAnswer([Map mediaConstraints]) {
     var completer = new Completer<RtcSessionDescription>();
     _createAnswer(
         (value) { completer.complete(value); },
         (error) { completer.completeError(error); }, mediaConstraints);
     return completer.future;
   }
+  // To suppress missing implicit constructor warnings.
+  factory RtcPeerConnection._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('RTCPeerConnection.addstreamEvent')
   @DocsEditable
   static const EventStreamProvider<MediaStreamEvent> addStreamEvent = const EventStreamProvider<MediaStreamEvent>('addstream');
 
   @DomName('RTCPeerConnection.datachannelEvent')
   @DocsEditable
   static const EventStreamProvider<RtcDataChannelEvent> dataChannelEvent = const EventStreamProvider<RtcDataChannelEvent>('datachannel');
 
   @DomName('RTCPeerConnection.icecandidateEvent')
@@ skipping 254 matching lines @@
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('RTCSessionDescription')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @Experimental
 // http://dev.w3.org/2011/webrtc/editor/webrtc.html#idl-def-RTCSessionDescription
-class RtcSessionDescription native "RTCSessionDescription,mozRTCSessionDescription" {
+class RtcSessionDescription extends Interceptor native "RTCSessionDescription,mozRTCSessionDescription" {
   factory RtcSessionDescription(Map dictionary) {
     // TODO(efortuna): Remove this check if when you can actually construct with
     // the unprefixed RTCIceCandidate in Firefox (currently both are defined,
     // but one can't be used as a constructor).
     var constructorName = JS('', 'window[#]',
-        Device.isFirefox ? '${Device.propertyPrefix}RTCSessionDescription' : 
+        Device.isFirefox ? '${Device.propertyPrefix}RTCSessionDescription' :
        'RTCSessionDescription');
-    return JS('RtcSessionDescription', 
+    return JS('RtcSessionDescription',
         'new #(#)', constructorName,
         convertDartToNative_SerializedScriptValue(dictionary));
   }
 
   @DomName('RTCSessionDescription.sdp')
   @DocsEditable
   String sdp;
 
   @DomName('RTCSessionDescription.type')
   @DocsEditable
   String type;
 
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('RTCStatsReport')
 // http://dev.w3.org/2011/webrtc/editor/webrtc.html#idl-def-RTCStatsReport
 @Experimental
-class RtcStatsReport native "RTCStatsReport" {
+class RtcStatsReport extends Interceptor native "RTCStatsReport" {
 
   @DomName('RTCStatsReport.id')
   @DocsEditable
   final String id;
 
   @DomName('RTCStatsReport.local')
   @DocsEditable
   final RtcStatsReport local;
 
   @DomName('RTCStatsReport.remote')
@@ skipping 21 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('RTCStatsResponse')
 // http://dev.w3.org/2011/webrtc/editor/webrtc.html#widl-RTCStatsReport-RTCStats-getter-DOMString-id
 @Experimental
-class RtcStatsResponse native "RTCStatsResponse" {
+class RtcStatsResponse extends Interceptor native "RTCStatsResponse" {
 
   @DomName('RTCStatsResponse.__getter__')
   @DocsEditable
   RtcStatsReport __getter__(String name) native;
 
   @DomName('RTCStatsResponse.namedItem')
   @DocsEditable
   RtcStatsReport namedItem(String name) native;
 
   @DomName('RTCStatsResponse.result')
   @DocsEditable
   List<RtcStatsReport> result() native;
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Screen')
-class Screen native "Screen" {
+class Screen extends Interceptor native "Screen" {
 
   @DomName('Screen.availHeight')
   @DomName('Screen.availLeft')
   @DomName('Screen.availTop')
   @DomName('Screen.availWidth')
   Rect get available => new Rect($dom_availLeft, $dom_availTop, $dom_availWidth,
       $dom_availHeight);
 
   @JSName('availHeight')
   @DomName('Screen.availHeight')
@@ skipping 34 matching lines @@
   final int width;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLScriptElement')
 class ScriptElement extends _HTMLElement native "HTMLScriptElement" {
+  // To suppress missing implicit constructor warnings.
+  factory ScriptElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLScriptElement.HTMLScriptElement')
   @DocsEditable
   factory ScriptElement() => document.$dom_createElement("script");
 
   @DomName('HTMLScriptElement.async')
   @DocsEditable
   bool async;
 
   @DomName('HTMLScriptElement.charset')
@@ skipping 38 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('SecurityPolicy')
 // https://dvcs.w3.org/hg/content-security-policy/raw-file/tip/csp-specification.dev.html#securitypolicy
 @Experimental
-class SecurityPolicy native "SecurityPolicy" {
+class SecurityPolicy extends Interceptor native "SecurityPolicy" {
 
   @DomName('SecurityPolicy.allowsEval')
   @DocsEditable
   final bool allowsEval;
 
   @DomName('SecurityPolicy.allowsInlineScript')
   @DocsEditable
   final bool allowsInlineScript;
 
   @DomName('SecurityPolicy.allowsInlineStyle')
@@ skipping 53 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('SecurityPolicyViolationEvent')
 // https://dvcs.w3.org/hg/content-security-policy/raw-file/tip/csp-specification.dev.html#securitypolicyviolationevent-events
 @Experimental
 class SecurityPolicyViolationEvent extends Event native "SecurityPolicyViolationEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory SecurityPolicyViolationEvent._() { throw new UnsupportedError("Not supported"); }
 
   @JSName('blockedURI')
   @DomName('SecurityPolicyViolationEvent.blockedURI')
   @DocsEditable
   final String blockedUri;
 
   @DomName('SecurityPolicyViolationEvent.columnNumber')
   @DocsEditable
   final int columnNumber;
 
@@ skipping 26 matching lines @@
   @DocsEditable
   final String violatedDirective;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('HTMLSelectElement')
 class SelectElement extends _HTMLElement native "HTMLSelectElement" {
+  // To suppress missing implicit constructor warnings.
+  factory SelectElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLSelectElement.HTMLSelectElement')
   @DocsEditable
   factory SelectElement() => document.$dom_createElement("select");
 
   @DomName('HTMLSelectElement.autofocus')
   @DocsEditable
   bool autofocus;
 
   @DomName('HTMLSelectElement.disabled')
@@ skipping 94 matching lines @@
     }
   }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Selection')
-class Selection native "Selection" {
+class Selection extends Interceptor native "Selection" {
 
   @DomName('Selection.anchorNode')
   @DocsEditable
   final Node anchorNode;
 
   @DomName('Selection.anchorOffset')
   @DocsEditable
   final int anchorOffset;
 
   @DomName('Selection.baseNode')
@@ skipping 106 matching lines @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLShadowElement')
 @SupportedBrowser(SupportedBrowser.CHROME, '26')
 @Experimental
 // https://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/shadow/index.html#shadow-element
 class ShadowElement extends _HTMLElement native "HTMLShadowElement" {
+  // To suppress missing implicit constructor warnings.
+  factory ShadowElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLShadowElement.HTMLShadowElement')
   @DocsEditable
   factory ShadowElement() => document.$dom_createElement("shadow");
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => Element.isTagSupported('shadow');
 
   @DomName('HTMLShadowElement.olderShadowRoot')
   @DocsEditable
   final ShadowRoot olderShadowRoot;
 
   @DomName('HTMLShadowElement.resetStyleInheritance')
   @DocsEditable
   bool resetStyleInheritance;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // WARNING: Do not edit - generated code.
 
 
 @DomName('ShadowRoot')
 @SupportedBrowser(SupportedBrowser.CHROME, '26')
 @Experimental
 // https://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/shadow/index.html#api-shadow-root
 class ShadowRoot extends DocumentFragment native "ShadowRoot" {
+  // To suppress missing implicit constructor warnings.
+  factory ShadowRoot._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('ShadowRoot.activeElement')
   @DocsEditable
   final Element activeElement;
 
   @DomName('ShadowRoot.applyAuthorStyles')
   @DocsEditable
   bool applyAuthorStyles;
 
   @JSName('innerHTML')
@@ skipping 41 matching lines @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('WebKitSourceBuffer')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 // https://dvcs.w3.org/hg/html-media/raw-file/tip/media-source/media-source.html#sourcebuffer
-class SourceBuffer native "WebKitSourceBuffer" {
+class SourceBuffer extends Interceptor native "WebKitSourceBuffer" {
 
   @DomName('WebKitSourceBuffer.buffered')
   @DocsEditable
   final TimeRanges buffered;
 
   @DomName('WebKitSourceBuffer.timestampOffset')
   @DocsEditable
   num timestampOffset;
 
   @DomName('WebKitSourceBuffer.abort')
@@ skipping 10 matching lines @@
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('WebKitSourceBufferList')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 // https://dvcs.w3.org/hg/html-media/raw-file/tip/media-source/media-source.html#sourcebufferlist
 class SourceBufferList extends EventTarget with ListMixin<SourceBuffer>, ImmutableListMixin<SourceBuffer> implements JavaScriptIndexingBehavior, List<SourceBuffer> native "WebKitSourceBufferList" {
+  // To suppress missing implicit constructor warnings.
+  factory SourceBufferList._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('WebKitSourceBufferList.length')
   @DocsEditable
   int get length => JS("int", "#.length", this);
 
   SourceBuffer operator[](int index) {
     if (JS("bool", "# >>> 0 !== # || # >= #", index,
         index, index, length))
       throw new RangeError.range(index, 0, length);
     return JS("SourceBuffer", "#[#]", this, index);
@@ skipping 55 matching lines @@
   void $dom_removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLSourceElement')
 class SourceElement extends _HTMLElement native "HTMLSourceElement" {
+  // To suppress missing implicit constructor warnings.
+  factory SourceElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLSourceElement.HTMLSourceElement')
   @DocsEditable
   factory SourceElement() => document.$dom_createElement("source");
 
   @DomName('HTMLSourceElement.media')
   @DocsEditable
   String media;
 
   @DomName('HTMLSourceElement.src')
   @DocsEditable
   String src;
 
   @DomName('HTMLSourceElement.type')
   @DocsEditable
   String type;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLSpanElement')
 class SpanElement extends _HTMLElement native "HTMLSpanElement" {
+  // To suppress missing implicit constructor warnings.
+  factory SpanElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLSpanElement.HTMLSpanElement')
   @DocsEditable
   factory SpanElement() => document.$dom_createElement("span");
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('SpeechGrammar')
 // https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html#dfn-speechgrammar
 @Experimental
-class SpeechGrammar native "SpeechGrammar" {
+class SpeechGrammar extends Interceptor native "SpeechGrammar" {
 
   @DomName('SpeechGrammar.SpeechGrammar')
   @DocsEditable
   factory SpeechGrammar() {
     return SpeechGrammar._create_1();
   }
   static SpeechGrammar _create_1() => JS('SpeechGrammar', 'new SpeechGrammar()');
 
   @DomName('SpeechGrammar.src')
   @DocsEditable
@@ skipping 84 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('SpeechInputEvent')
 // http://lists.w3.org/Archives/Public/public-xg-htmlspeech/2011Feb/att-0020/api-draft.html#speech_input_event_interface
 @Experimental
 class SpeechInputEvent extends Event native "SpeechInputEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory SpeechInputEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('SpeechInputEvent.results')
   @DocsEditable
   @Returns('_SpeechInputResultList')
   @Creates('_SpeechInputResultList')
   final List<SpeechInputResult> results;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('SpeechInputResult')
 // http://lists.w3.org/Archives/Public/public-xg-htmlspeech/2011Feb/att-0020/api-draft.html#speech_input_result_interface
 @Experimental
-class SpeechInputResult native "SpeechInputResult" {
+class SpeechInputResult extends Interceptor native "SpeechInputResult" {
 
   @DomName('SpeechInputResult.confidence')
   @DocsEditable
   final num confidence;
 
   @DomName('SpeechInputResult.utterance')
   @DocsEditable
   final String utterance;
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('SpeechRecognition')
 @SupportedBrowser(SupportedBrowser.CHROME, '25')
 @Experimental
 // https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html#speechreco-section
 class SpeechRecognition extends EventTarget native "SpeechRecognition" {
+  // To suppress missing implicit constructor warnings.
+  factory SpeechRecognition._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('SpeechRecognition.audioendEvent')
   @DocsEditable
   static const EventStreamProvider<Event> audioEndEvent = const EventStreamProvider<Event>('audioend');
 
   @DomName('SpeechRecognition.audiostartEvent')
   @DocsEditable
   static const EventStreamProvider<Event> audioStartEvent = const EventStreamProvider<Event>('audiostart');
 
   @DomName('SpeechRecognition.endEvent')
@@ skipping 133 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('SpeechRecognitionAlternative')
 @SupportedBrowser(SupportedBrowser.CHROME, '25')
 @Experimental
 // https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html#speechrecognitionalternative
-class SpeechRecognitionAlternative native "SpeechRecognitionAlternative" {
+class SpeechRecognitionAlternative extends Interceptor native "SpeechRecognitionAlternative" {
 
   @DomName('SpeechRecognitionAlternative.confidence')
   @DocsEditable
   final num confidence;
 
   @DomName('SpeechRecognitionAlternative.transcript')
   @DocsEditable
   final String transcript;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('SpeechRecognitionError')
 @SupportedBrowser(SupportedBrowser.CHROME, '25')
 @Experimental
 // https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html#speechreco-error
 class SpeechRecognitionError extends Event native "SpeechRecognitionError" {
+  // To suppress missing implicit constructor warnings.
+  factory SpeechRecognitionError._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('SpeechRecognitionError.error')
   @DocsEditable
   final String error;
 
   @DomName('SpeechRecognitionError.message')
   @DocsEditable
   final String message;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('SpeechRecognitionEvent')
 @SupportedBrowser(SupportedBrowser.CHROME, '25')
 @Experimental
 // https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html#speechreco-event
 class SpeechRecognitionEvent extends Event native "SpeechRecognitionEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory SpeechRecognitionEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('SpeechRecognitionEvent.emma')
   @DocsEditable
   final Document emma;
 
   @DomName('SpeechRecognitionEvent.interpretation')
   @DocsEditable
   final Document interpretation;
 
   @DomName('SpeechRecognitionEvent.resultIndex')
   @DocsEditable
   final int resultIndex;
 
   @DomName('SpeechRecognitionEvent.results')
   @DocsEditable
   @Returns('_SpeechRecognitionResultList')
   @Creates('_SpeechRecognitionResultList')
   final List<SpeechRecognitionResult> results;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('SpeechRecognitionResult')
 @SupportedBrowser(SupportedBrowser.CHROME, '25')
 @Experimental
 // https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html#speechrecognitionresult
-class SpeechRecognitionResult native "SpeechRecognitionResult" {
+class SpeechRecognitionResult extends Interceptor native "SpeechRecognitionResult" {
 
   @DomName('SpeechRecognitionResult.isFinal')
   @DocsEditable
   final bool isFinal;
 
   @DomName('SpeechRecognitionResult.length')
   @DocsEditable
   final int length;
 
   @DomName('SpeechRecognitionResult.item')
   @DocsEditable
   SpeechRecognitionAlternative item(int index) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('SpeechSynthesis')
 // https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html#tts-section
 @Experimental
-class SpeechSynthesis native "SpeechSynthesis" {
+class SpeechSynthesis extends Interceptor native "SpeechSynthesis" {
 
   @DomName('SpeechSynthesis.paused')
   @DocsEditable
   final bool paused;
 
   @DomName('SpeechSynthesis.pending')
   @DocsEditable
   final bool pending;
 
   @DomName('SpeechSynthesis.speaking')
@@ skipping 23 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('SpeechSynthesisEvent')
 // https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html#tts-section
 @Experimental
 class SpeechSynthesisEvent extends Event native "SpeechSynthesisEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory SpeechSynthesisEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('SpeechSynthesisEvent.charIndex')
   @DocsEditable
   final int charIndex;
 
   @DomName('SpeechSynthesisEvent.elapsedTime')
   @DocsEditable
   final num elapsedTime;
 
   @DomName('SpeechSynthesisEvent.name')
   @DocsEditable
   final String name;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('SpeechSynthesisUtterance')
 // https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html#tts-section
 @Experimental
 class SpeechSynthesisUtterance extends EventTarget native "SpeechSynthesisUtterance" {
+  // To suppress missing implicit constructor warnings.
+  factory SpeechSynthesisUtterance._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('SpeechSynthesisUtterance.boundaryEvent')
   @DocsEditable
   static const EventStreamProvider<SpeechSynthesisEvent> boundaryEvent = const EventStreamProvider<SpeechSynthesisEvent>('boundary');
 
   @DomName('SpeechSynthesisUtterance.endEvent')
   @DocsEditable
   static const EventStreamProvider<SpeechSynthesisEvent> endEvent = const EventStreamProvider<SpeechSynthesisEvent>('end');
 
   @DomName('SpeechSynthesisUtterance.errorEvent')
@@ skipping 81 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('SpeechSynthesisVoice')
 // https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html#tts-section
 @Experimental
-class SpeechSynthesisVoice native "SpeechSynthesisVoice" {
+class SpeechSynthesisVoice extends Interceptor native "SpeechSynthesisVoice" {
 
   @JSName('default')
   @DomName('SpeechSynthesisVoice.default')
   @DocsEditable
   final bool defaultValue;
 
   @DomName('SpeechSynthesisVoice.lang')
   @DocsEditable
   final String lang;
 
@@ skipping 35 matching lines @@
  *     assert(window.localStorage.length == 0);
  *
  * For more examples of using this API, see
  * [localstorage_test.dart](http://code.google.com/p/dart/source/browse/branches/bleeding_edge/dart/tests/html/localstorage_test.dart).
  * For details on using the Map API, see the
  * [Maps](http://www.dartlang.org/docs/library-tour/#maps-aka-dictionaries-or-hashes)
  * section of the library tour.
  */
 @DomName('Storage')
 @Unstable
-class Storage implements Map<String, String>
-     native "Storage" {
+class Storage extends Interceptor
+    implements Map<String, String>  native "Storage" {
 
   // TODO(nweiz): update this when maps support lazy iteration
   bool containsValue(String value) => values.any((e) => e == value);
 
   bool containsKey(String key) => $dom_getItem(key) != null;
 
   String operator [](String key) => $dom_getItem(key);
 
   void operator []=(String key, String value) { $dom_setItem(key, value); }
 
@@ skipping 103 matching lines @@
 class StorageEvent extends Event native "StorageEvent" {
   factory StorageEvent(String type,
     {bool canBubble: false, bool cancelable: false, String key, String oldValue,
     String newValue, String url, Storage storageArea}) {
 
     var e = document.$dom_createEvent("StorageEvent");
     e.$dom_initStorageEvent(type, canBubble, cancelable, key, oldValue,
         newValue, url, storageArea);
     return e;
   }
+  // To suppress missing implicit constructor warnings.
+  factory StorageEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('StorageEvent.key')
   @DocsEditable
   final String key;
 
   @DomName('StorageEvent.newValue')
   @DocsEditable
   final String newValue;
 
   @DomName('StorageEvent.oldValue')
@@ skipping 15 matching lines @@
 
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('StorageInfo')
 // http://www.w3.org/TR/file-system-api/
 @Experimental
-class StorageInfo native "StorageInfo" {
+class StorageInfo extends Interceptor native "StorageInfo" {
 
   @DomName('StorageInfo.PERSISTENT')
   @DocsEditable
   static const int PERSISTENT = 1;
 
   @DomName('StorageInfo.TEMPORARY')
   @DocsEditable
   static const int TEMPORARY = 0;
 
   @JSName('queryUsageAndQuota')
@@ skipping 13 matching lines @@
     var completer = new Completer<int>();
     _requestQuota(storageType, newQuotaInBytes,
         (value) { completer.complete(value); },
         (error) { completer.completeError(error); });
     return completer.future;
   }
 
   Future<StorageInfoUsage> queryUsageAndQuota(int storageType) {
     var completer = new Completer<StorageInfoUsage>();
     _queryUsageAndQuota(storageType,
-        (currentUsageInBytes, currentQuotaInBytes) { 
-          completer.complete(new StorageInfoUsage(currentUsageInBytes, 
+        (currentUsageInBytes, currentQuotaInBytes) {
+          completer.complete(new StorageInfoUsage(currentUsageInBytes,
               currentQuotaInBytes));
         },
         (error) { completer.completeError(error); });
     return completer.future;
   }
 }
 
-/** 
+/**
  * A simple container class for the two values that are returned from the
  * futures in requestQuota and queryUsageAndQuota.
  */
 class StorageInfoUsage {
   final int currentUsageInBytes;
   final int currentQuotaInBytes;
   const StorageInfoUsage(this.currentUsageInBytes, this.currentQuotaInBytes);
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('StorageQuota')
 // http://www.w3.org/TR/quota-api/#idl-def-StorageQuota
 @Experimental
-class StorageQuota native "StorageQuota" {
+class StorageQuota extends Interceptor native "StorageQuota" {
 
   @DomName('StorageQuota.queryUsageAndQuota')
   @DocsEditable
   void queryUsageAndQuota(StorageUsageCallback usageCallback, [StorageErrorCallback errorCallback]) native;
 
   @DomName('StorageQuota.requestQuota')
   @DocsEditable
   void requestQuota(int newQuotaInBytes, [StorageQuotaCallback quotaCallback, StorageErrorCallback errorCallback]) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
@@ skipping 30 matching lines @@
 @Experimental
 typedef void _StringCallback(String data);
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLStyleElement')
 class StyleElement extends _HTMLElement native "HTMLStyleElement" {
+  // To suppress missing implicit constructor warnings.
+  factory StyleElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLStyleElement.HTMLStyleElement')
   @DocsEditable
   factory StyleElement() => document.$dom_createElement("style");
 
   @DomName('HTMLStyleElement.disabled')
   @DocsEditable
   bool disabled;
 
   @DomName('HTMLStyleElement.media')
@@ skipping 14 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('StyleMedia')
 // http://developer.apple.com/library/safari/#documentation/SafariDOMAdditions/Reference/StyleMedia/StyleMedia/StyleMedia.html
 @Experimental // nonstandard
-class StyleMedia native "StyleMedia" {
+class StyleMedia extends Interceptor native "StyleMedia" {
 
   @DomName('StyleMedia.type')
   @DocsEditable
   final String type;
 
   @DomName('StyleMedia.matchMedium')
   @DocsEditable
   bool matchMedium(String mediaquery) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('StyleSheet')
-class StyleSheet native "StyleSheet" {
+class StyleSheet extends Interceptor native "StyleSheet" {
 
   @DomName('StyleSheet.disabled')
   @DocsEditable
   bool disabled;
 
   @DomName('StyleSheet.href')
   @DocsEditable
   final String href;
 
   @DomName('StyleSheet.media')
@@ skipping 17 matching lines @@
   final String type;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLTableCaptionElement')
 class TableCaptionElement extends _HTMLElement native "HTMLTableCaptionElement" {
+  // To suppress missing implicit constructor warnings.
+  factory TableCaptionElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLTableCaptionElement.HTMLTableCaptionElement')
   @DocsEditable
   factory TableCaptionElement() => document.$dom_createElement("caption");
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLTableCellElement')
 class TableCellElement extends _HTMLElement native "HTMLTableCellElement,HTMLTableDataCellElement,HTMLTableHeaderCellElement" {
+  // To suppress missing implicit constructor warnings.
+  factory TableCellElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLTableCellElement.HTMLTableCellElement')
   @DocsEditable
   factory TableCellElement() => document.$dom_createElement("td");
 
   @DomName('HTMLTableCellElement.cellIndex')
   @DocsEditable
   final int cellIndex;
 
   @DomName('HTMLTableCellElement.colSpan')
   @DocsEditable
   int colSpan;
 
   @DomName('HTMLTableCellElement.headers')
   @DocsEditable
   String headers;
 
   @DomName('HTMLTableCellElement.rowSpan')
   @DocsEditable
   int rowSpan;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLTableColElement')
 class TableColElement extends _HTMLElement native "HTMLTableColElement" {
+  // To suppress missing implicit constructor warnings.
+  factory TableColElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLTableColElement.HTMLTableColElement')
   @DocsEditable
   factory TableColElement() => document.$dom_createElement("col");
 
   @DomName('HTMLTableColElement.span')
   @DocsEditable
   int span;
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
@@ skipping 28 matching lines @@
       return this._createTBody();
     }
     var tbody = new Element.tag('tbody');
     this.children.add(tbody);
     return tbody;
   }
 
   @JSName('createTBody')
   TableSectionElement _createTBody() native;
 
+  // To suppress missing implicit constructor warnings.
+  factory TableElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLTableElement.HTMLTableElement')
   @DocsEditable
   factory TableElement() => document.$dom_createElement("table");
 
   @DomName('HTMLTableElement.border')
   @DocsEditable
   // http://www.whatwg.org/specs/web-apps/current-work/multipage/obsolete.html#HTMLTableElement-partial
   @deprecated // deprecated
   String border;
@@ skipping 68 matching lines @@
   @DomName('HTMLTableRowElement.cells')
   List<TableCellElement> get cells =>
       new _WrappedList<TableCellElement>($dom_cells);
 
   TableCellElement addCell() {
     return insertCell(-1);
   }
 
   TableCellElement insertCell(int index) => $dom_insertCell(index);
 
+  // To suppress missing implicit constructor warnings.
+  factory TableRowElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLTableRowElement.HTMLTableRowElement')
   @DocsEditable
   factory TableRowElement() => document.$dom_createElement("tr");
 
   @JSName('cells')
   @DomName('HTMLTableRowElement.cells')
   @DocsEditable
   final HtmlCollection $dom_cells;
 
@@ skipping 26 matching lines @@
   @DomName('HTMLTableSectionElement.rows')
   List<TableRowElement> get rows =>
     new _WrappedList<TableRowElement>($dom_rows);
 
   TableRowElement addRow() {
     return insertRow(-1);
   }
 
   TableRowElement insertRow(int index) => $dom_insertRow(index);
 
+  // To suppress missing implicit constructor warnings.
+  factory TableSectionElement._() { throw new UnsupportedError("Not supported"); }
 
   @JSName('rows')
   @DomName('HTMLTableSectionElement.rows')
   @DocsEditable
   final HtmlCollection $dom_rows;
 
   @DomName('HTMLTableSectionElement.deleteRow')
   @DocsEditable
   void deleteRow(int index) native;
 
@@ skipping 101 matching lines @@
   getInstanceFragment(Element template) => template.createInstance();
 }
 
 
 @Experimental
 @DomName('HTMLTemplateElement')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @Experimental
 // https://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/templates/index.html#template-element
 class TemplateElement extends _HTMLElement native "HTMLTemplateElement" {
+  // To suppress missing implicit constructor warnings.
+  factory TemplateElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLTemplateElement.HTMLTemplateElement')
   @DocsEditable
   factory TemplateElement() => document.$dom_createElement("template");
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => Element.isTagSupported('template');
 
   @JSName('content')
   @DomName('HTMLTemplateElement.content')
@@ skipping 209 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // WARNING: Do not edit - generated code.
 
 
 @DomName('Text')
 class Text extends CharacterData native "Text" {
   factory Text(String data) => document.$dom_createTextNode(data);
+  // To suppress missing implicit constructor warnings.
+  factory Text._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('Text.wholeText')
   @DocsEditable
   final String wholeText;
 
   @DomName('Text.replaceWholeText')
   @DocsEditable
   // http://dom.spec.whatwg.org/#dom-text-replacewholetext
   @deprecated // deprecated
   Text replaceWholeText(String content) native;
 
   @DomName('Text.splitText')
   @DocsEditable
   Text splitText(int offset) native;
 
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLTextAreaElement')
 class TextAreaElement extends _HTMLElement native "HTMLTextAreaElement" {
+  // To suppress missing implicit constructor warnings.
+  factory TextAreaElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLTextAreaElement.HTMLTextAreaElement')
   @DocsEditable
   factory TextAreaElement() => document.$dom_createElement("textarea");
 
   @DomName('HTMLTextAreaElement.autofocus')
   @DocsEditable
   bool autofocus;
 
   @DomName('HTMLTextAreaElement.cols')
@@ skipping 123 matching lines @@
 class TextEvent extends UIEvent native "TextEvent" {
   factory TextEvent(String type,
     {bool canBubble: false, bool cancelable: false, Window view, String data}) {
     if (view == null) {
       view = window;
     }
     var e = document.$dom_createEvent("TextEvent");
     e.$dom_initTextEvent(type, canBubble, cancelable, view, data);
     return e;
   }
+  // To suppress missing implicit constructor warnings.
+  factory TextEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('TextEvent.data')
   @DocsEditable
   final String data;
 
   @JSName('initTextEvent')
   @DomName('TextEvent.initTextEvent')
   @DocsEditable
   void $dom_initTextEvent(String typeArg, bool canBubbleArg, bool cancelableArg, Window viewArg, String dataArg) native;
 
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('TextMetrics')
-class TextMetrics native "TextMetrics" {
+class TextMetrics extends Interceptor native "TextMetrics" {
 
   @DomName('TextMetrics.width')
   @DocsEditable
   final num width;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('TextTrack')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#texttrack
 @Experimental
 class TextTrack extends EventTarget native "TextTrack" {
+  // To suppress missing implicit constructor warnings.
+  factory TextTrack._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('TextTrack.cuechangeEvent')
   @DocsEditable
   static const EventStreamProvider<Event> cueChangeEvent = const EventStreamProvider<Event>('cuechange');
 
   @DomName('TextTrack.activeCues')
   @DocsEditable
   final TextTrackCueList activeCues;
 
   @DomName('TextTrack.cues')
@@ skipping 45 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('TextTrackCue')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#texttrackcue
 @Experimental
 class TextTrackCue extends EventTarget native "TextTrackCue" {
+  // To suppress missing implicit constructor warnings.
+  factory TextTrackCue._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('TextTrackCue.enterEvent')
   @DocsEditable
   static const EventStreamProvider<Event> enterEvent = const EventStreamProvider<Event>('enter');
 
   @DomName('TextTrackCue.exitEvent')
   @DocsEditable
   static const EventStreamProvider<Event> exitEvent = const EventStreamProvider<Event>('exit');
 
   @DomName('TextTrackCue.TextTrackCue')
@@ skipping 156 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('TextTrackList')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#texttracklist
 @Experimental
 class TextTrackList extends EventTarget with ListMixin<TextTrack>, ImmutableListMixin<TextTrack> implements JavaScriptIndexingBehavior, List<TextTrack> native "TextTrackList" {
+  // To suppress missing implicit constructor warnings.
+  factory TextTrackList._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('TextTrackList.addtrackEvent')
   @DocsEditable
   static const EventStreamProvider<TrackEvent> addTrackEvent = const EventStreamProvider<TrackEvent>('addtrack');
 
   @DomName('TextTrackList.length')
   @DocsEditable
   int get length => JS("int", "#.length", this);
 
   TextTrack operator[](int index) {
@@ skipping 63 matching lines @@
   Stream<TrackEvent> get onAddTrack => addTrackEvent.forTarget(this);
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('TimeRanges')
 @Unstable
-class TimeRanges native "TimeRanges" {
+class TimeRanges extends Interceptor native "TimeRanges" {
 
   @DomName('TimeRanges.length')
   @DocsEditable
   final int length;
 
   @DomName('TimeRanges.end')
   @DocsEditable
   num end(int index) native;
 
   @DomName('TimeRanges.start')
@@ skipping 10 matching lines @@
 @DomName('TimeoutHandler')
 typedef void TimeoutHandler();
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLTitleElement')
 class TitleElement extends _HTMLElement native "HTMLTitleElement" {
+  // To suppress missing implicit constructor warnings.
+  factory TitleElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLTitleElement.HTMLTitleElement')
   @DocsEditable
   factory TitleElement() => document.$dom_createElement("title");
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Touch')
 // http://www.w3.org/TR/touch-events/, http://www.chromestatus.com/features
 @Experimental
-class Touch native "Touch" {
+class Touch extends Interceptor native "Touch" {
 
   @JSName('clientX')
   @DomName('Touch.clientX')
   @DocsEditable
   final int $dom_clientX;
 
   @JSName('clientY')
   @DomName('Touch.clientY')
   @DocsEditable
   final int $dom_clientY;
@@ skipping 92 matching lines @@
       int clientY: 0, bool ctrlKey: false, bool altKey: false,
       bool shiftKey: false, bool metaKey: false}) {
     if (view == null) {
       view = window;
     }
     var e = document.$dom_createEvent("TouchEvent");
     e.$dom_initTouchEvent(touches, targetTouches, changedTouches, type, view,
         screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey, metaKey);
     return e;
   }
+  // To suppress missing implicit constructor warnings.
+  factory TouchEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('TouchEvent.altKey')
   @DocsEditable
   final bool altKey;
 
   @DomName('TouchEvent.changedTouches')
   @DocsEditable
   final TouchList changedTouches;
 
   @DomName('TouchEvent.ctrlKey')
@@ skipping 113 matching lines @@
 
 
 @DocsEditable
 @DomName('HTMLTrackElement')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.IE, '10')
 @SupportedBrowser(SupportedBrowser.SAFARI)
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#the-track-element
 @Experimental
 class TrackElement extends _HTMLElement native "HTMLTrackElement" {
+  // To suppress missing implicit constructor warnings.
+  factory TrackElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLTrackElement.HTMLTrackElement')
   @DocsEditable
   factory TrackElement() => document.$dom_createElement("track");
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => Element.isTagSupported('track');
 
   @DomName('HTMLTrackElement.ERROR')
   @DocsEditable
@@ skipping 42 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('TrackEvent')
 @Unstable
 class TrackEvent extends Event native "TrackEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory TrackEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('TrackEvent.track')
   @DocsEditable
   @Creates('Null')
   final Object track;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('TransitionEvent')
 class TransitionEvent extends Event native "TransitionEvent,WebKitTransitionEvent" {
+  // To suppress missing implicit constructor warnings.
+  factory TransitionEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('TransitionEvent.elapsedTime')
   @DocsEditable
   final num elapsedTime;
 
   @DomName('TransitionEvent.propertyName')
   @DocsEditable
   final String propertyName;
 
   @DomName('TransitionEvent.pseudoElement')
   @DocsEditable
   final String pseudoElement;
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('TreeWalker')
 @Unstable
-class TreeWalker native "TreeWalker" {
+class TreeWalker extends Interceptor native "TreeWalker" {
   factory TreeWalker(Node root, int whatToShow) {
     return document.$dom_createTreeWalker(root, whatToShow, null, false);
   }
 
   @DomName('TreeWalker.currentNode')
   @DocsEditable
   Node currentNode;
 
   @DomName('TreeWalker.expandEntityReferences')
   @DocsEditable
@@ skipping 60 matching lines @@
   factory UIEvent(String type,
       {Window view, int detail: 0, bool canBubble: true,
       bool cancelable: true}) {
     if (view == null) {
       view = window;
     }
     final e = document.$dom_createEvent("UIEvent");
     e.$dom_initUIEvent(type, canBubble, cancelable, view, detail);
     return e;
   }
+  // To suppress missing implicit constructor warnings.
+  factory UIEvent._() { throw new UnsupportedError("Not supported"); }
 
   @JSName('charCode')
   @DomName('UIEvent.charCode')
   @DocsEditable
   @Unstable
   final int $dom_charCode;
 
   @DomName('UIEvent.detail')
   @DocsEditable
   final int detail;
@@ skipping 70 matching lines @@
   Point get page => new Point($dom_pageX, $dom_pageY);
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLUListElement')
 class UListElement extends _HTMLElement native "HTMLUListElement" {
+  // To suppress missing implicit constructor warnings.
+  factory UListElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLUListElement.HTMLUListElement')
   @DocsEditable
   factory UListElement() => document.$dom_createElement("ul");
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLUnknownElement')
 class UnknownElement extends _HTMLElement native "HTMLUnknownElement" {
+  // To suppress missing implicit constructor warnings.
+  factory UnknownElement._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('URL')
-class Url native "URL" {
+class Url extends Interceptor native "URL" {
 
   static String createObjectUrl(blob_OR_source_OR_stream) =>
       JS('String',
          '(self.URL || self.webkitURL).createObjectURL(#)',
          blob_OR_source_OR_stream);
 
   static void revokeObjectUrl(String url) =>
       JS('void',
          '(self.URL || self.webkitURL).revokeObjectURL(#)', url);
 
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('ValidityState')
-class ValidityState native "ValidityState" {
+class ValidityState extends Interceptor native "ValidityState" {
 
   @DomName('ValidityState.badInput')
   @DocsEditable
   final bool badInput;
 
   @DomName('ValidityState.customError')
   @DocsEditable
   final bool customError;
 
   @DomName('ValidityState.patternMismatch')
@@ skipping 28 matching lines @@
   @DocsEditable
   final bool valueMissing;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DomName('HTMLVideoElement')
 class VideoElement extends MediaElement implements CanvasImageSource native "HTMLVideoElement" {
+  // To suppress missing implicit constructor warnings.
+  factory VideoElement._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('HTMLVideoElement.HTMLVideoElement')
   @DocsEditable
   factory VideoElement() => document.$dom_createElement("video");
 
   @DomName('HTMLVideoElement.height')
   @DocsEditable
   int height;
 
   @DomName('HTMLVideoElement.poster')
@@ skipping 138 matching lines @@
  * [Introducing WebSockets](http://www.html5rocks.com/en/tutorials/websockets/basics/),
  * an HTML5Rocks.com tutorial.
  */
 @DomName('WebSocket')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.FIREFOX)
 @SupportedBrowser(SupportedBrowser.IE, '10')
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Unstable
 class WebSocket extends EventTarget native "WebSocket" {
+  // To suppress missing implicit constructor warnings.
+  factory WebSocket._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('WebSocket.closeEvent')
   @DocsEditable
   static const EventStreamProvider<CloseEvent> closeEvent = const EventStreamProvider<CloseEvent>('close');
 
   @DomName('WebSocket.errorEvent')
   @DocsEditable
   static const EventStreamProvider<Event> errorEvent = const EventStreamProvider<Event>('error');
 
   @DomName('WebSocket.messageEvent')
@@ skipping 180 matching lines @@
           metaKey, button, relatedTarget);
       event.$dom_initWebKitWheelEvent(deltaX,
           deltaY ~/ 120, // Chrome does an auto-convert to pixels.
           view, screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey,
           metaKey);
     }
 
     return event;
   }
 
+  // To suppress missing implicit constructor warnings.
+  factory WheelEvent._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('WheelEvent.DOM_DELTA_LINE')
   @DocsEditable
   static const int DOM_DELTA_LINE = 0x01;
 
   @DomName('WheelEvent.DOM_DELTA_PAGE')
   @DocsEditable
   static const int DOM_DELTA_PAGE = 0x02;
 
   @DomName('WheelEvent.DOM_DELTA_PIXEL')
@@ skipping 187 matching lines @@
    * port may be retrieved by any isolate (or JavaScript script)
    * running in this window.
    */
   void registerPort(String name, var port) {
     var serialized = _serialize(port);
     document.documentElement.attributes['dart-port:$name'] =
         json.stringify(serialized);
   }
 
   /**
-   * Returns a Future that completes just before the window is about to 
+   * Returns a Future that completes just before the window is about to
    * repaint so the user can draw an animation frame.
    *
    * If you need to later cancel this animation, use [requestAnimationFrame]
    * instead.
    *
    * The [Future] completes to a timestamp that represents a floating
-   * point value of the number of milliseconds that have elapsed since the page 
-   * started to load (which is also the timestamp at this call to 
+   * point value of the number of milliseconds that have elapsed since the page
+   * started to load (which is also the timestamp at this call to
    * animationFrame).
    *
    * Note: The code that runs when the future completes should call
    * [animationFrame] again for the animation to continue.
    */
   Future<num> get animationFrame {
     var completer = new Completer<num>();
     requestAnimationFrame((time) {
       completer.complete(time);
     });
@@ skipping 180 matching lines @@
     var result = _convertPointFromPageToNode(node,
         new _DomPoint(point.x, point.y));
     return new Point(result.x, result.y);
   }
 
   /**
    * Checks whether [convertPointFromNodeToPage] and
    * [convertPointFromPageToNode] are supported on the current platform.
    */
   static bool get supportsPointConversions => _DomPoint.supported;
+  // To suppress missing implicit constructor warnings.
+  factory Window._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('Window.DOMContentLoadedEvent')
   @DocsEditable
   static const EventStreamProvider<Event> contentLoadedEvent = const EventStreamProvider<Event>('DOMContentLoaded');
 
   @DomName('Window.devicemotionEvent')
   @DocsEditable
   // http://dev.w3.org/geo/api/spec-source-orientation.html#devicemotion
   @Experimental
   static const EventStreamProvider<DeviceMotionEvent> deviceMotionEvent = const EventStreamProvider<DeviceMotionEvent>('devicemotion');
@@ skipping 847 matching lines @@
 
 @DocsEditable
 @DomName('Worker')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.FIREFOX)
 @SupportedBrowser(SupportedBrowser.IE, '10')
 @SupportedBrowser(SupportedBrowser.SAFARI)
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/workers.html#worker
 @Experimental // stable
 class Worker extends AbstractWorker native "Worker" {
+  // To suppress missing implicit constructor warnings.
+  factory Worker._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('Worker.messageEvent')
   @DocsEditable
   static const EventStreamProvider<MessageEvent> messageEvent = const EventStreamProvider<MessageEvent>('message');
 
   @DomName('Worker.Worker')
   @DocsEditable
   factory Worker(String scriptUrl) {
     return Worker._create_1(scriptUrl);
   }
@@ skipping 16 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('XPathEvaluator')
 // http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathEvaluator
 @deprecated // experimental
-class XPathEvaluator native "XPathEvaluator" {
+class XPathEvaluator extends Interceptor native "XPathEvaluator" {
 
   @DomName('XPathEvaluator.XPathEvaluator')
   @DocsEditable
   factory XPathEvaluator() {
     return XPathEvaluator._create_1();
   }
   static XPathEvaluator _create_1() => JS('XPathEvaluator', 'new XPathEvaluator()');
 
   @DomName('XPathEvaluator.createExpression')
   @DocsEditable
   XPathExpression createExpression(String expression, XPathNSResolver resolver) native;
 
   @DomName('XPathEvaluator.createNSResolver')
   @DocsEditable
   XPathNSResolver createNSResolver(Node nodeResolver) native;
 
   @DomName('XPathEvaluator.evaluate')
   @DocsEditable
   XPathResult evaluate(String expression, Node contextNode, XPathNSResolver resolver, int type, XPathResult inResult) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('XPathException')
 // http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathException
 @deprecated // experimental
-class XPathException native "XPathException" {
+class XPathException extends Interceptor native "XPathException" {
 
   @DomName('XPathException.INVALID_EXPRESSION_ERR')
   @DocsEditable
   static const int INVALID_EXPRESSION_ERR = 51;
 
   @DomName('XPathException.TYPE_ERR')
   @DocsEditable
   static const int TYPE_ERR = 52;
 
   @DomName('XPathException.code')
@@ skipping 16 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('XPathExpression')
 // http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathExpression
 @deprecated // experimental
-class XPathExpression native "XPathExpression" {
+class XPathExpression extends Interceptor native "XPathExpression" {
 
   @DomName('XPathExpression.evaluate')
   @DocsEditable
   XPathResult evaluate(Node contextNode, int type, XPathResult inResult) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('XPathNSResolver')
 // http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathNSResolver
 @deprecated // experimental
-class XPathNSResolver native "XPathNSResolver" {
+class XPathNSResolver extends Interceptor native "XPathNSResolver" {
 
   @JSName('lookupNamespaceURI')
   @DomName('XPathNSResolver.lookupNamespaceURI')
   @DocsEditable
   String lookupNamespaceUri(String prefix) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('XPathResult')
 // http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathResult
 @deprecated // experimental
-class XPathResult native "XPathResult" {
+class XPathResult extends Interceptor native "XPathResult" {
 
   @DomName('XPathResult.ANY_TYPE')
   @DocsEditable
   static const int ANY_TYPE = 0;
 
   @DomName('XPathResult.ANY_UNORDERED_NODE_TYPE')
   @DocsEditable
   static const int ANY_UNORDERED_NODE_TYPE = 8;
 
   @DomName('XPathResult.BOOLEAN_TYPE')
@@ skipping 66 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('XMLSerializer')
 // http://domparsing.spec.whatwg.org/#the-xmlserializer-interface
 @deprecated // stable
-class XmlSerializer native "XMLSerializer" {
+class XmlSerializer extends Interceptor native "XMLSerializer" {
 
   @DomName('XMLSerializer.XMLSerializer')
   @DocsEditable
   factory XmlSerializer() {
     return XmlSerializer._create_1();
   }
   static XmlSerializer _create_1() => JS('XmlSerializer', 'new XMLSerializer()');
 
   @DomName('XMLSerializer.serializeToString')
   @DocsEditable
   String serializeToString(Node node) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('XSLTProcessor')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.FIREFOX)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @deprecated // nonstandard
-class XsltProcessor native "XSLTProcessor" {
+class XsltProcessor extends Interceptor native "XSLTProcessor" {
 
   @DomName('XSLTProcessor.XSLTProcessor')
   @DocsEditable
   factory XsltProcessor() {
     return XsltProcessor._create_1();
   }
   static XsltProcessor _create_1() => JS('XsltProcessor', 'new XSLTProcessor()');
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => JS('bool', '!!(window.XSLTProcessor)');
@@ skipping 31 matching lines @@
   DocumentFragment transformToFragment(Node source, Document docVal) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Attr')
 class _Attr extends Node native "Attr" {
+  // To suppress missing implicit constructor warnings.
+  factory _Attr._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('Attr.isId')
   @DocsEditable
   final bool isId;
 
   @DomName('Attr.name')
   @DocsEditable
   final String name;
 
   @DomName('Attr.ownerElement')
@@ skipping 13 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CSSPrimitiveValue')
 // http://dev.w3.org/csswg/cssom/#the-cssstyledeclaration-interface
 @deprecated // deprecated
 abstract class _CSSPrimitiveValue extends _CSSValue native "CSSPrimitiveValue" {
+  // To suppress missing implicit constructor warnings.
+  factory _CSSPrimitiveValue._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CSSValue')
 // http://dev.w3.org/csswg/cssom/
 @deprecated // deprecated
-abstract class _CSSValue native "CSSValue" {
+abstract class _CSSValue extends Interceptor native "CSSValue" {
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('ClientRect')
-class _ClientRect implements Rect native "ClientRect" {
+class _ClientRect extends Interceptor implements Rect native "ClientRect" {
 
   // NOTE! All code below should be common with Rect.
   // TODO(blois): implement with mixins when available.
 
   String toString() {
     return '($left, $top, $width, $height)';
   }
 
   bool operator ==(other) {
     if (other is !Rect) return false;
@@ skipping 167 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Counter')
 // http://dev.w3.org/csswg/cssom/
 @deprecated // deprecated
-abstract class _Counter native "Counter" {
+abstract class _Counter extends Interceptor native "Counter" {
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CSSRuleList')
 class _CssRuleList extends Interceptor with ListMixin<CssRule>, ImmutableListMixin<CssRule> implements JavaScriptIndexingBehavior, List<CssRule> native "CSSRuleList" {
 
@@ skipping 52 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('CSSValueList')
 // http://dev.w3.org/csswg/cssom/
 @deprecated // deprecated
 class _CssValueList extends _CSSValue with ListMixin<_CSSValue>, ImmutableListMixin<_CSSValue> implements JavaScriptIndexingBehavior, List<_CSSValue> native "CSSValueList" {
+  // To suppress missing implicit constructor warnings.
+  factory _CssValueList._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('CSSValueList.length')
   @DocsEditable
   int get length => JS("int", "#.length", this);
 
   _CSSValue operator[](int index) {
     if (JS("bool", "# >>> 0 !== # || # >= #", index,
         index, index, length))
       throw new RangeError.range(index, 0, length);
     return JS("_CSSValue", "#[#]", this, index);
@@ skipping 43 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DOMFileSystemSync')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @Experimental
 // http://www.w3.org/TR/file-system-api/#the-filesystemsync-interface
-abstract class _DOMFileSystemSync native "DOMFileSystemSync" {
+abstract class _DOMFileSystemSync extends Interceptor native "DOMFileSystemSync" {
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DatabaseSync')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 // http://www.w3.org/TR/webdatabase/#databasesync
 @deprecated // deprecated
-abstract class _DatabaseSync native "DatabaseSync" {
+abstract class _DatabaseSync extends Interceptor native "DatabaseSync" {
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DedicatedWorkerContext')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/workers.html
 @Experimental
 abstract class _DedicatedWorkerContext extends _WorkerContext native "DedicatedWorkerContext" {
+  // To suppress missing implicit constructor warnings.
+  factory _DedicatedWorkerContext._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DirectoryEntrySync')
 // http://www.w3.org/TR/file-system-api/#the-directoryentrysync-interface
 @Experimental
 abstract class _DirectoryEntrySync extends _EntrySync native "DirectoryEntrySync" {
+  // To suppress missing implicit constructor warnings.
+  factory _DirectoryEntrySync._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('DirectoryReaderSync')
 // http://www.w3.org/TR/file-system-api/#idl-def-DirectoryReaderSync
 @Experimental
-abstract class _DirectoryReaderSync native "DirectoryReaderSync" {
+abstract class _DirectoryReaderSync extends Interceptor native "DirectoryReaderSync" {
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('WebKitPoint')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 // http://developer.apple.com/library/safari/#documentation/DataManagement/Reference/DOMWindowAdditionsReference/DOMWindowAdditions/DOMWindowAdditions.html
 @Experimental // non-standard
-class _DomPoint native "WebKitPoint" {
+class _DomPoint extends Interceptor native "WebKitPoint" {
 
   @DomName('WebKitPoint.DOMPoint')
   @DocsEditable
   factory _DomPoint(num x, num y) {
     return _DomPoint._create_1(x, y);
   }
   static _DomPoint _create_1(x, y) => JS('_DomPoint', 'new WebKitPoint(#,#)', x, y);
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => JS('bool', '!!(window.WebKitPoint)');
 
   @DomName('WebKitPoint.x')
   @DocsEditable
   num x;
 
   @DomName('WebKitPoint.y')
   @DocsEditable
   num y;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Entity')
 @deprecated // deprecated
 class _Entity extends Node native "Entity" {
+  // To suppress missing implicit constructor warnings.
+  factory _Entity._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('Entity.notationName')
   @DocsEditable
   final String notationName;
 
   @DomName('Entity.publicId')
   @DocsEditable
   final String publicId;
 
   @DomName('Entity.systemId')
@@ skipping 128 matching lines @@
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('EntrySync')
 // http://www.w3.org/TR/file-system-api/#idl-def-EntrySync
 @Experimental
-abstract class _EntrySync native "EntrySync" {
+abstract class _EntrySync extends Interceptor native "EntrySync" {
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('FileEntrySync')
 // http://www.w3.org/TR/file-system-api/#the-fileentrysync-interface
 @Experimental
 abstract class _FileEntrySync extends _EntrySync native "FileEntrySync" {
+  // To suppress missing implicit constructor warnings.
+  factory _FileEntrySync._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('FileReaderSync')
 // http://www.w3.org/TR/FileAPI/#FileReaderSync
 @Experimental
-abstract class _FileReaderSync native "FileReaderSync" {
+abstract class _FileReaderSync extends Interceptor native "FileReaderSync" {
 
   @DomName('FileReaderSync.FileReaderSync')
   @DocsEditable
   factory _FileReaderSync() {
     return _FileReaderSync._create_1();
   }
   static _FileReaderSync _create_1() => JS('_FileReaderSync', 'new FileReaderSync()');
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('FileWriterSync')
 // http://www.w3.org/TR/file-writer-api/#idl-def-FileWriterSync
 @Experimental
-abstract class _FileWriterSync native "FileWriterSync" {
+abstract class _FileWriterSync extends Interceptor native "FileWriterSync" {
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('GamepadList')
 // https://dvcs.w3.org/hg/gamepad/raw-file/default/gamepad.html
 @Experimental
@@ skipping 54 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLAppletElement')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/obsolete.html#the-applet-element
 @deprecated // deprecated
 abstract class _HTMLAppletElement extends _HTMLElement native "HTMLAppletElement" {
+  // To suppress missing implicit constructor warnings.
+  factory _HTMLAppletElement._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLBaseFontElement')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/obsolete.html#basefont
 @deprecated // deprecated
 abstract class _HTMLBaseFontElement extends _HTMLElement native "HTMLBaseFontElement" {
+  // To suppress missing implicit constructor warnings.
+  factory _HTMLBaseFontElement._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLDirectoryElement')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/obsolete.html#dir
 @deprecated // deprecated
 abstract class _HTMLDirectoryElement extends _HTMLElement native "HTMLDirectoryElement" {
+  // To suppress missing implicit constructor warnings.
+  factory _HTMLDirectoryElement._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLFontElement')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/obsolete.html#htmlfontelement
 @deprecated // deprecated
 abstract class _HTMLFontElement extends _HTMLElement native "HTMLFontElement" {
+  // To suppress missing implicit constructor warnings.
+  factory _HTMLFontElement._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLFrameElement')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/obsolete.html#htmlframeelement
 @deprecated // deprecated
 abstract class _HTMLFrameElement extends _HTMLElement native "HTMLFrameElement" {
+  // To suppress missing implicit constructor warnings.
+  factory _HTMLFrameElement._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLFrameSetElement')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/obsolete.html#frameset
 @deprecated // deprecated
 abstract class _HTMLFrameSetElement extends _HTMLElement native "HTMLFrameSetElement" {
+  // To suppress missing implicit constructor warnings.
+  factory _HTMLFrameSetElement._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLMarqueeElement')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/obsolete.html#the-marquee-element
 @deprecated // deprecated
 abstract class _HTMLMarqueeElement extends _HTMLElement native "HTMLMarqueeElement" {
+  // To suppress missing implicit constructor warnings.
+  factory _HTMLMarqueeElement._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('NamedNodeMap')
 // http://dom.spec.whatwg.org/#namednodemap
 @deprecated // deprecated
@@ skipping 80 matching lines @@
   Node setNamedItemNS(Node node) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('PagePopupController')
 @deprecated // nonstandard
-abstract class _PagePopupController native "PagePopupController" {
+abstract class _PagePopupController extends Interceptor native "PagePopupController" {
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('RGBColor')
 // http://dev.w3.org/csswg/cssom/
 @deprecated // deprecated
-abstract class _RGBColor native "RGBColor" {
+abstract class _RGBColor extends Interceptor native "RGBColor" {
 }
 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 // Omit RadioNodeList for dart2js.  The Dart Form and FieldSet APIs don't
 // currently expose an API the returns RadioNodeList.  The only use of a
 // RadioNodeList is to get the selected value and it will be cleaner to
 // introduce a different API for that purpose.
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Rect')
 // http://dev.w3.org/csswg/cssom/
 @deprecated // deprecated
-abstract class _Rect native "Rect" {
+abstract class _Rect extends Interceptor native "Rect" {
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('SharedWorker')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/workers.html#shared-workers-and-the-sharedworker-interface
 @Experimental
 abstract class _SharedWorker extends AbstractWorker native "SharedWorker" {
+  // To suppress missing implicit constructor warnings.
+  factory _SharedWorker._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('SharedWorker.SharedWorker')
   @DocsEditable
   factory _SharedWorker(String scriptURL, [String name]) {
     if (name != null) {
       return _SharedWorker._create_1(scriptURL, name);
     }
     return _SharedWorker._create_2(scriptURL);
   }
   static _SharedWorker _create_1(scriptURL, name) => JS('_SharedWorker', 'new SharedWorker(#,#)', scriptURL, name);
   static _SharedWorker _create_2(scriptURL) => JS('_SharedWorker', 'new SharedWorker(#)', scriptURL);
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('SharedWorkerContext')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/workers.html#shared-workers-and-the-sharedworkerglobalscope-interface
 @Experimental // nonstandard
 abstract class _SharedWorkerContext extends _WorkerContext native "SharedWorkerContext" {
+  // To suppress missing implicit constructor warnings.
+  factory _SharedWorkerContext._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('SpeechInputResultList')
 // http://lists.w3.org/Archives/Public/public-xg-htmlspeech/2011Feb/att-0020/api-draft.html#speech_input_result_list_interface
 @Experimental
@@ skipping 182 matching lines @@
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('WorkerContext')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/workers.html#WorkerGlobalScope-partial
 @Experimental // stable
 abstract class _WorkerContext extends EventTarget native "WorkerContext" {
+  // To suppress missing implicit constructor warnings.
+  factory _WorkerContext._() { throw new UnsupportedError("Not supported"); }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('WorkerLocation')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/workers.html#workerlocation
 @Experimental
-abstract class _WorkerLocation native "WorkerLocation" {
+abstract class _WorkerLocation extends Interceptor native "WorkerLocation" {
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('WorkerNavigator')
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/workers.html#workernavigator
 @Experimental
-abstract class _WorkerNavigator native "WorkerNavigator" {
+abstract class _WorkerNavigator extends Interceptor native "WorkerNavigator" {
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 abstract class _AttributeMap implements Map<String, String> {
   final Element _element;
 
   _AttributeMap(this._element);
@@ skipping 3298 matching lines @@
       _position = nextPosition;
       return true;
     }
     _current = null;
     _position = _array.length;
     return false;
   }
 
   T get current => _current;
 }