dart:html perf optimization based on runing Dromaeo benchmarks

lib/html/frog/html_frog.dart

 #library('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.
 
 // DO NOT EDIT
 // Auto-generated dart:html library.
 
 
 
 
 
-_WindowImpl _cachedWindow;
-_DocumentImpl _cachedDocument;
 
-void _init() {
-  _cachedDocument = _document;
-  _cachedWindow = _window;
-  // Feature detect that dart:dom and dart:html are not both loaded by
-  // checking for the presence of a bug that manifests itself when both
-  // libraries are loaded.
-  // TODO(jacobr): remove this code once b/1911 is fixed and the frog compiler
-  // is changed to generate compile time errors if two libraries that define
-  // the same native types in conflicting ways are imported.
-  var element = new Element.tag('body');
-  element.innerHTML = 'f';
-  if (element.text == '') {
-    _cachedWindow.console.error(
-      'Cannot import dart:html and dart:dom within the same application.');
-    throw new UnsupportedOperationException(
-      'Cannot import dart:html and dart:dom within the same application.');
-  }
-}
-
-Window get window() {
-  if (_cachedWindow == null) {
-    _init();
-  }
-  return _cachedWindow;
-}
-
+Window get window() native "return window;";
 _WindowImpl get _window() native "return window;";
 
-Document get document() {
-  if (_cachedDocument == null) {
-    _init();
-  }
-  return _cachedDocument;
-}
+Document get document() native "return document;";
 
-_DocumentImpl get _document() native "return window.document.documentElement;";
+_DocumentImpl get _document() native "return document;";
 
 // Workaround for tags like <cite> that lack their own Element subclass --
 // Dart issue 1990.
 class _HTMLElementImpl extends _ElementImpl native "*HTMLElement" {
 }
 
 class _AbstractWorkerImpl extends _EventTargetImpl implements AbstractWorker native "*AbstractWorker" {
 
   _AbstractWorkerEventsImpl get on() =>
     new _AbstractWorkerEventsImpl(this);
 
-  void _addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
 
-  bool _dispatchEvent(_EventImpl evt) native "return this.dispatchEvent(evt);";
+  bool $dom_dispatchEvent(_EventImpl evt) native "return this.dispatchEvent(evt);";
 
-  void _removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
 }
 
 class _AbstractWorkerEventsImpl extends _EventsImpl implements AbstractWorkerEvents {
   _AbstractWorkerEventsImpl(_ptr) : super(_ptr);
 
   EventListenerList get error() => _get('error');
 }
 
 class _AnchorElementImpl extends _ElementImpl implements AnchorElement native "*HTMLAnchorElement" {
 
@@ skipping 4121 matching lines @@
   static final int OBSOLETE = 5;
 
   static final int UNCACHED = 0;
 
   static final int UPDATEREADY = 4;
 
   final int status;
 
   void abort() native;
 
-  void _addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
 
-  bool _dispatchEvent(_EventImpl evt) native "return this.dispatchEvent(evt);";
+  bool $dom_dispatchEvent(_EventImpl evt) native "return this.dispatchEvent(evt);";
 
-  void _removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
 
   void swapCache() native;
 
   void update() native;
 }
 
 class _DOMApplicationCacheEventsImpl extends _EventsImpl implements DOMApplicationCacheEvents {
   _DOMApplicationCacheEventsImpl(_ptr) : super(_ptr);
 
   EventListenerList get cached() => _get('cached');
@@ skipping 90 matching lines @@
 
 class _DOMFormDataImpl implements DOMFormData native "*DOMFormData" {
 
   void append(String name, String value, String filename) native;
 }
 
 class _DOMImplementationImpl implements DOMImplementation native "*DOMImplementation" {
 
   _CSSStyleSheetImpl createCSSStyleSheet(String title, String media) native;
 
-  _DocumentImpl createDocument(String namespaceURI, String qualifiedName, _DocumentTypeImpl doctype) => _FixHtmlDocumentReference(_createDocument(namespaceURI, qualifiedName, doctype));
-
-  _EventTargetImpl _createDocument(String namespaceURI, String qualifiedName, _DocumentTypeImpl doctype) native "return this.createDocument(namespaceURI, qualifiedName, doctype);";
+  _DocumentImpl createDocument(String namespaceURI, String qualifiedName, _DocumentTypeImpl doctype) native;
 
   _DocumentTypeImpl createDocumentType(String qualifiedName, String publicId, String systemId) native;
 
-  _DocumentImpl createHTMLDocument(String title) => _FixHtmlDocumentReference(_createHTMLDocument(title));
-
-  _EventTargetImpl _createHTMLDocument(String title) native "return this.createHTMLDocument(title);";
+  _DocumentImpl createHTMLDocument(String title) native;
 
   bool hasFeature(String feature, String version) native;
 }
 
 class _DOMMimeTypeImpl implements DOMMimeType native "*DOMMimeType" {
 
   final String description;
 
   final _DOMPluginImpl enabledPlugin;
 
   final String suffixes;
 
   final String type;
 }
 
 class _DOMMimeTypeArrayImpl implements DOMMimeTypeArray native "*DOMMimeTypeArray" {
 
   final int length;
 
   _DOMMimeTypeImpl item(int index) native;
 
   _DOMMimeTypeImpl namedItem(String name) native;
 }
 
 class _DOMParserImpl implements DOMParser native "*DOMParser" {
 
-  _DocumentImpl parseFromString(String str, String contentType) => _FixHtmlDocumentReference(_parseFromString(str, contentType));
-
-  _EventTargetImpl _parseFromString(String str, String contentType) native "return this.parseFromString(str, contentType);";
+  _DocumentImpl parseFromString(String str, String contentType) native;
 }
 
 class _DOMPluginImpl implements DOMPlugin native "*DOMPlugin" {
 
   final String description;
 
   final String filename;
 
   final int length;
 
@@ skipping 300 matching lines @@
 }
 
 class _DivElementImpl extends _ElementImpl implements DivElement native "*HTMLDivElement" {
 
   String align;
 }
 // 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.
 
-class _DocumentImpl extends _ElementImpl
+class _DocumentImpl extends _NodeImpl
     implements Document
-    native "*HTMLHtmlElement" {
+    native "*HTMLDocument"
+    {
+
 
   _DocumentEventsImpl get on() =>
-    new _DocumentEventsImpl(_jsDocument);
+    new _DocumentEventsImpl(this);
 
-  _ElementImpl get activeElement() native "return this.parentNode.activeElement;";
+  final _ElementImpl activeElement;
 
-  _ElementImpl get body() native "return this.parentNode.body;";
+  _ElementImpl body;
 
-  void set body(_ElementImpl value) native "this.parentNode.body = value;";
+  String charset;
 
-  String get charset() native "return this.parentNode.charset;";
+  String cookie;
 
-  void set charset(String value) native "this.parentNode.charset = value;";
+  _WindowImpl get window() native "return this.defaultView;";
 
-  String get cookie() native "return this.parentNode.cookie;";
+  final _ElementImpl documentElement;
 
-  void set cookie(String value) native "this.parentNode.cookie = value;";
+  final String domain;
 
-  _WindowImpl get window() native "return this.parentNode.defaultView;";
+  final _HeadElementImpl head;
 
-  String get domain() native "return this.parentNode.domain;";
+  final String lastModified;
 
-  _HeadElementImpl get head() native "return this.parentNode.head;";
+  final String preferredStylesheetSet;
 
-  String get lastModified() native "return this.parentNode.lastModified;";
+  final String readyState;
 
-  String get preferredStylesheetSet() native "return this.parentNode.preferredStylesheetSet;";
+  final String referrer;
 
-  String get readyState() native "return this.parentNode.readyState;";
+  String selectedStylesheetSet;
 
-  String get referrer() native "return this.parentNode.referrer;";
+  final _StyleSheetListImpl styleSheets;
 
-  String get selectedStylesheetSet() native "return this.parentNode.selectedStylesheetSet;";
+  String title;
 
-  void set selectedStylesheetSet(String value) native "this.parentNode.selectedStylesheetSet = value;";
+  final _ElementImpl webkitCurrentFullScreenElement;
 
-  _StyleSheetListImpl get styleSheets() native "return this.parentNode.styleSheets;";
+  final bool webkitFullScreenKeyboardInputAllowed;
 
-  String get title() native "return this.parentNode.title;";
+  final _ElementImpl webkitFullscreenElement;
 
-  void set title(String value) native "this.parentNode.title = value;";
+  final bool webkitFullscreenEnabled;
 
-  _ElementImpl get webkitCurrentFullScreenElement() native "return this.parentNode.webkitCurrentFullScreenElement;";
+  final bool webkitHidden;
 
-  bool get webkitFullScreenKeyboardInputAllowed() native "return this.parentNode.webkitFullScreenKeyboardInputAllowed;";
+  final bool webkitIsFullScreen;
 
-  _ElementImpl get webkitFullscreenElement() native "return this.parentNode.webkitFullscreenElement;";
+  final String webkitVisibilityState;
 
-  bool get webkitFullscreenEnabled() native "return this.parentNode.webkitFullscreenEnabled;";
+  _RangeImpl caretRangeFromPoint(int x, int y) native;
 
-  bool get webkitHidden() native "return this.parentNode.webkitHidden;";
+  _CDATASectionImpl createCDATASection(String data) native;
 
-  bool get webkitIsFullScreen() native "return this.parentNode.webkitIsFullScreen;";
+  _DocumentFragmentImpl createDocumentFragment() native;
 
-  String get webkitVisibilityState() native "return this.parentNode.webkitVisibilityState;";
+  _ElementImpl $dom_createElement(String tagName) native "return this.createElement(tagName);";
 
-  _RangeImpl caretRangeFromPoint(int x, int y) native "return this.parentNode.caretRangeFromPoint(x, y);";
+  _ElementImpl $dom_createElementNS(String namespaceURI, String qualifiedName) native "return this.createElementNS(namespaceURI, qualifiedName);";
 
-  _CDATASectionImpl createCDATASection(String data) native "return this.parentNode.createCDATASection(data);";
+  _EventImpl $dom_createEvent(String eventType) native "return this.createEvent(eventType);";
 
-  _DocumentFragmentImpl createDocumentFragment() native "return this.parentNode.createDocumentFragment();";
+  _RangeImpl createRange() native;
 
-  _ElementImpl _createElement(String tagName) native "return this.parentNode.createElement(tagName);";
+  _TextImpl $dom_createTextNode(String data) native "return this.createTextNode(data);";
 
-  _ElementImpl _createElementNS(String namespaceURI, String qualifiedName) native "return this.parentNode.createElementNS(namespaceURI, qualifiedName);";
+  _TouchImpl createTouch(_WindowImpl window, _EventTargetImpl target, int identifier, int pageX, int pageY, int screenX, int screenY, int webkitRadiusX, int webkitRadiusY, num webkitRotationAngle, num webkitForce) native;
 
-  _EventImpl _createEvent(String eventType) native "return this.parentNode.createEvent(eventType);";
+  _TouchListImpl $dom_createTouchList() native "return this.createTouchList();";
 
-  _RangeImpl createRange() native "return this.parentNode.createRange();";
+  _ElementImpl elementFromPoint(int x, int y) native;
 
-  _TextImpl _createTextNode(String data) native "return this.parentNode.createTextNode(data);";
+  bool execCommand(String command, bool userInterface, String value) native;
 
-  _TouchImpl createTouch(_WindowImpl window, _EventTargetImpl target, int identifier, int pageX, int pageY, int screenX, int screenY, int webkitRadiusX, int webkitRadiusY, num webkitRotationAngle, num webkitForce) native "return this.parentNode.createTouch(window, target, identifier, pageX, pageY, screenX, screenY, webkitRadiusX, webkitRadiusY, webkitRotationAngle, webkitForce);";
+  _CanvasRenderingContextImpl getCSSCanvasContext(String contextId, String name, int width, int height) native;
 
-  _TouchListImpl _createTouchList() native "return this.parentNode.createTouchList();";
+  _ElementImpl $dom_getElementById(String elementId) native "return this.getElementById(elementId);";
 
-  _ElementImpl elementFromPoint(int x, int y) native "return this.parentNode.elementFromPoint(x, y);";
+  _NodeListImpl $dom_getElementsByClassName(String tagname) native "return this.getElementsByClassName(tagname);";
 
-  bool execCommand(String command, bool userInterface, String value) native "return this.parentNode.execCommand(command, userInterface, value);";
+  _NodeListImpl $dom_getElementsByName(String elementName) native "return this.getElementsByName(elementName);";
 
-  _CanvasRenderingContextImpl getCSSCanvasContext(String contextId, String name, int width, int height) native "return this.parentNode.getCSSCanvasContext(contextId, name, width, height);";
+  _NodeListImpl $dom_getElementsByTagName(String tagname) native "return this.getElementsByTagName(tagname);";
 
-  bool queryCommandEnabled(String command) native "return this.parentNode.queryCommandEnabled(command);";
+  bool queryCommandEnabled(String command) native;
 
-  bool queryCommandIndeterm(String command) native "return this.parentNode.queryCommandIndeterm(command);";
+  bool queryCommandIndeterm(String command) native;
 
-  bool queryCommandState(String command) native "return this.parentNode.queryCommandState(command);";
+  bool queryCommandState(String command) native;
 
-  bool queryCommandSupported(String command) native "return this.parentNode.queryCommandSupported(command);";
+  bool queryCommandSupported(String command) native;
 
-  String queryCommandValue(String command) native "return this.parentNode.queryCommandValue(command);";
+  String queryCommandValue(String command) native;
 
-  void webkitCancelFullScreen() native "this.parentNode.webkitCancelFullScreen();";
+  _ElementImpl _query(String selectors) native "return this.querySelector(selectors);";
 
-  void webkitExitFullscreen() native "this.parentNode.webkitExitFullscreen();";
+  _NodeListImpl $dom_querySelectorAll(String selectors) native "return this.querySelectorAll(selectors);";
 
-  _WebKitNamedFlowImpl webkitGetFlowByName(String name) native "return this.parentNode.webkitGetFlowByName(name);";
+  void webkitCancelFullScreen() native;
 
+  void webkitExitFullscreen() native;
 
-  // For efficiency and simplicity, we always use the HtmlElement as the
-  // Document but sometimes internally we need the real JS document object.
-  _NodeImpl get _jsDocument() native "return this.parentNode;";
+  _WebKitNamedFlowImpl webkitGetFlowByName(String name) native;
 
-  // The document doesn't have a parent element.
-  _ElementImpl get parent() => null;
-}
+  // TODO(jacobr): implement all Element methods not on Document. 
 
-// This class should not be externally visible.  If a user ever gets access to
-// a _SecretHtmlDocumentImpl object that is a bug.  This object is hidden by
-// adding checks to all methods that could an HTMLDocument.  We believe that
-// list is limited to Event.target, and HTMLHtmlElement.parent.
-class _SecretHtmlDocumentImpl extends _NodeImpl implements Node
-    native "*HTMLDocument" {
-  _DocumentImpl get _documentElement() native "return this.documentElement;";
-}
+  _ElementImpl query(String selectors) {
+    // It is fine for our RegExp to detect element id query selectors to have
+    // false negatives but not false positives.
+    if (const RegExp("^#[_a-zA-Z]\\w*\$").hasMatch(selectors)) {
+      return $dom_getElementById(selectors.substring(1));
+    }
+    return $dom_querySelector(selectors);
+  }
 
-EventTarget _FixHtmlDocumentReference(EventTarget eventTarget) {
-  if (eventTarget is _SecretHtmlDocumentImpl) {
-    _SecretHtmlDocumentImpl secretDocument = eventTarget;
-    return secretDocument._documentElement;
-  } else {
-    return eventTarget;
+// TODO(jacobr): autogenerate this method.
+  _ElementImpl $dom_querySelector(String selectors) native "return this.querySelector(selectors);";
+
+  ElementList queryAll(String selectors) {
+    if (const RegExp("""^\\[name=["'][^'"]+['"]\\]\$""").hasMatch(selectors)) {
+      final mutableMatches = $dom_getElementsByName(
+          selectors.substring(7,selectors.length - 2));
+      int len = mutableMatches.length;
+      final copyOfMatches = new List<Element>(len);
+      for (int i = 0; i < len; ++i) {
+        copyOfMatches[i] = mutableMatches[i];
+      }
+      return new _FrozenElementList._wrap(copyOfMatches);
+    } else if (const RegExp("^[*a-zA-Z0-9]+\$").hasMatch(selectors)) {
+      final mutableMatches = $dom_getElementsByTagName(selectors);
+      int len = mutableMatches.length;
+      final copyOfMatches = new List<Element>(len);
+      for (int i = 0; i < len; ++i) {
+        copyOfMatches[i] = mutableMatches[i];
+      }
+      return new _FrozenElementList._wrap(copyOfMatches);
+    } else {
+      return new _FrozenElementList._wrap($dom_querySelectorAll(selectors));
+    }
   }
 }
 
 class _DocumentEventsImpl extends _ElementEventsImpl implements DocumentEvents {
   _DocumentEventsImpl(_ptr) : super(_ptr);
 
   EventListenerList get abort() => _get('abort');
 
   EventListenerList get beforeCopy() => _get('beforecopy');
 
@@ skipping 228 matching lines @@
   // TODO: The type of value should be Collection<Element>. See http://b/5392897
   void set elements(value) {
     // Copy list first since we don't want liveness during iteration.
     List copy = new List.from(value);
     final elements = this.elements;
     elements.clear();
     elements.addAll(copy);
   }
 
   ElementList queryAll(String selectors) =>
-    new _FrozenElementList._wrap(_querySelectorAll(selectors));
+    new _FrozenElementList._wrap($dom_querySelectorAll(selectors));
 
   String get innerHTML() {
     final e = new Element.tag("div");
     e.nodes.add(this.clone(true));
     return e.innerHTML;
   }
 
   String get outerHTML() => innerHTML;
 
   // TODO(nweiz): Do we want to support some variant of innerHTML for XML and/or
@@ skipping 48 matching lines @@
   bool get draggable() => false;
   bool get hidden() => false;
   bool get spellcheck() => false;
   bool get translate() => false;
   int get tabIndex() => -1;
   String get id() => "";
   String get title() => "";
   String get tagName() => "";
   String get webkitdropzone() => "";
   String get webkitRegionOverflow() => "";
-  Element get firstElementChild() => elements.first();
-  Element get lastElementChild() => elements.last();
+  Element get $dom_firstElementChild() => elements.first();
+  Element get $dom_lastElementChild() => elements.last();
   Element get nextElementSibling() => null;
   Element get previousElementSibling() => null;
   Element get offsetParent() => null;
   Element get parent() => null;
   Map<String, String> get attributes() => const {};
   // Issue 174: this should be a const set.
   Set<String> get classes() => new Set<String>();
   Map<String, String> get dataAttributes() => const {};
   CSSStyleDeclaration get style() => new Element.tag('div').style;
   Future<CSSStyleDeclaration> get computedStyle() =>
@@ skipping 109 matching lines @@
     throw new UnsupportedOperationException(
       "WebKit region overflow can't be set for document fragments.");
   }
 
 
   _ElementEventsImpl get on() =>
     new _ElementEventsImpl(this);
 
   _ElementImpl query(String selectors) native "return this.querySelector(selectors);";
 
-  _NodeListImpl _querySelectorAll(String selectors) native "return this.querySelectorAll(selectors);";
+  _NodeListImpl $dom_querySelectorAll(String selectors) native "return this.querySelectorAll(selectors);";
 
 }
 
 class _DocumentTypeImpl extends _NodeImpl implements DocumentType native "*DocumentType" {
 
   final _NamedNodeMapImpl entities;
 
   final String internalSubset;
 
   final String name;
@@ skipping 27 matching lines @@
 // BSD-style license that can be found in the LICENSE file.
 
 // TODO(jacobr): use _Lists.dart to remove some of the duplicated
 // functionality.
 class _ChildrenElementList implements ElementList {
   // Raw Element.
   final _ElementImpl _element;
   final _HTMLCollectionImpl _childElements;
 
   _ChildrenElementList._wrap(_ElementImpl element)
-    : _childElements = element._children,
+    : _childElements = element.$dom_children,
       _element = element;
 
   List<Element> _toList() {
     final output = new List(_childElements.length);
     for (int i = 0, len = _childElements.length; i < len; i++) {
       output[i] = _childElements[i];
     }
     return output;
   }
 
   _ElementImpl get first() {
-    return _element._firstElementChild;
+    return _element.$dom_firstElementChild;
   }
 
   void forEach(void f(Element element)) {
     for (_ElementImpl element in _childElements) {
       f(element);
     }
   }
 
   ElementList filter(bool f(Element element)) {
     final output = <Element>[];
@@ skipping 25 matching lines @@
 
   Collection map(f(Element element)) {
     final out = [];
     for (Element el in this) {
       out.add(f(el));
     }
     return out;
   }
 
   bool isEmpty() {
-    return _element._firstElementChild == null;
+    return _element.$dom_firstElementChild == null;
   }
 
   int get length() {
     return _childElements.length;
   }
 
   _ElementImpl operator [](int index) {
     return _childElements[index];
   }
 
   void operator []=(int index, _ElementImpl value) {
-    _element._replaceChild(value, _childElements[index]);
+    _element.$dom_replaceChild(value, _childElements[index]);
   }
 
    void set length(int newLength) {
      // TODO(jacobr): remove children when length is reduced.
      throw const UnsupportedOperationException('');
    }
 
   Element add(_ElementImpl value) {
-    _element._appendChild(value);
+    _element.$dom_appendChild(value);
     return value;
   }
 
   Element addLast(_ElementImpl value) => add(value);
 
   Iterator<Element> iterator() => _toList().iterator();
 
   void addAll(Collection<Element> collection) {
     for (_ElementImpl element in collection) {
-      _element._appendChild(element);
+      _element.$dom_appendChild(element);
     }
   }
 
   void sort(int compare(Element a, Element b)) {
     throw const UnsupportedOperationException('TODO(jacobr): should we impl?');
   }
 
   void copyFrom(List<Object> src, int srcStart, int dstStart, int count) {
     throw 'Not impl yet. todo(jacobr)';
   }
@@ skipping 24 matching lines @@
   }
 
   void clear() {
     // It is unclear if we want to keep non element nodes?
     _element.text = '';
   }
 
   Element removeLast() {
     final last = this.last();
     if (last != null) {
-      _element._removeChild(last);
+      _element.$dom_removeChild(last);
     }
     return last;
   }
 
   Element last() {
-    return _element.lastElementChild;
+    return _element.$dom_lastElementChild;
   }
 }
 
 // TODO(jacobr): this is an inefficient implementation but it is hard to see
 // a better option given that we cannot quite force NodeList to be an
 // ElementList as there are valid cases where a NodeList JavaScript object
 // contains Node objects that are not Elements.
 class _FrozenElementList implements ElementList {
   final List<Node> _nodeList;
 
@@ skipping 141 matching lines @@
     new _ElementList(super.getRange(start, length));
 }
 
 class ElementAttributeMap implements Map<String, String> {
 
   final _ElementImpl _element;
 
   ElementAttributeMap._wrap(this._element);
 
   bool containsValue(String value) {
-    final attributes = _element._attributes;
+    final attributes = _element.$dom_attributes;
     for (int i = 0, len = attributes.length; i < len; i++) {
       if(value == attributes[i].value) {
         return true;
       }
     }
     return false;
   }
 
   bool containsKey(String key) {
-    return _element._hasAttribute(key);
+    return _element.$dom_hasAttribute(key);
   }
 
   String operator [](String key) {
-    return _element._getAttribute(key);
+    return _element.$dom_getAttribute(key);
   }
 
   void operator []=(String key, String value) {
-    _element._setAttribute(key, value);
+    _element.$dom_setAttribute(key, value);
   }
 
   String putIfAbsent(String key, String ifAbsent()) {
     if (!containsKey(key)) {
       this[key] = ifAbsent();
     }
   }
 
   String remove(String key) {
-    _element._removeAttribute(key);
+    _element.$dom_removeAttribute(key);
   }
 
   void clear() {
-    final attributes = _element._attributes;
+    final attributes = _element.$dom_attributes;
     for (int i = attributes.length - 1; i >= 0; i--) {
       remove(attributes[i].name);
     }
   }
 
   void forEach(void f(String key, String value)) {
-    final attributes = _element._attributes;
+    final attributes = _element.$dom_attributes;
     for (int i = 0, len = attributes.length; i < len; i++) {
       final item = attributes[i];
       f(item.name, item.value);
     }
   }
 
   Collection<String> getKeys() {
     // TODO(jacobr): generate a lazy collection instead.
-    final attributes = _element._attributes;
+    final attributes = _element.$dom_attributes;
     final keys = new List<String>(attributes.length);
     for (int i = 0, len = attributes.length; i < len; i++) {
       keys[i] = attributes[i].name;
     }
     return keys;
   }
 
   Collection<String> getValues() {
     // TODO(jacobr): generate a lazy collection instead.
-    final attributes = _element._attributes;
+    final attributes = _element.$dom_attributes;
     final values = new List<String>(attributes.length);
     for (int i = 0, len = attributes.length; i < len; i++) {
       values[i] = attributes[i].value;
     }
     return values;
   }
 
   /**
    * The number of {key, value} pairs in the map.
    */
   int get length() {
-    return _element._attributes.length;
+    return _element.$dom_attributes.length;
   }
 
   /**
    * Returns true if there is no {key, value} pair in the map.
    */
   bool isEmpty() {
     return length == 0;
   }
 }
 
@@ skipping 26 matching lines @@
   final ClientRect client;
   final ClientRect offset;
   final ClientRect scroll;
 
   // TODO(jacobr): should we move these outside of ElementRect to avoid the
   // overhead of computing them every time even though they are rarely used.
   final _ClientRectImpl _boundingClientRect; 
   final _ClientRectListImpl _clientRects;
 
   _ElementRectImpl(_ElementImpl element) :
-    client = new _SimpleClientRect(element._clientLeft,
-                                  element._clientTop,
-                                  element._clientWidth, 
-                                  element._clientHeight), 
-    offset = new _SimpleClientRect(element._offsetLeft,
-                                  element._offsetTop,
-                                  element._offsetWidth,
-                                  element._offsetHeight),
-    scroll = new _SimpleClientRect(element._scrollLeft,
-                                  element._scrollTop,
-                                  element._scrollWidth,
-                                  element._scrollHeight),
-    _boundingClientRect = element._getBoundingClientRect(),
-    _clientRects = element._getClientRects();
+    client = new _SimpleClientRect(element.$dom_clientLeft,
+                                  element.$dom_clientTop,
+                                  element.$dom_clientWidth, 
+                                  element.$dom_clientHeight), 
+    offset = new _SimpleClientRect(element.$dom_offsetLeft,
+                                  element.$dom_offsetTop,
+                                  element.$dom_offsetWidth,
+                                  element.$dom_offsetHeight),
+    scroll = new _SimpleClientRect(element.$dom_scrollLeft,
+                                  element.$dom_scrollTop,
+                                  element.$dom_scrollWidth,
+                                  element.$dom_scrollHeight),
+    _boundingClientRect = element.$dom_getBoundingClientRect(),
+    _clientRects = element.$dom_getClientRects();
 
   _ClientRectImpl get bounding() => _boundingClientRect;
 
   // TODO(jacobr): cleanup.
   List<ClientRect> get clientRects() {
     final out = new List(_clientRects.length);
     for (num i = 0; i < _clientRects.length; i++) {
       out[i] = _clientRects.item(i);
     }
     return out;
@@ skipping 28 matching lines @@
 
   void set elements(Collection<Element> value) {
     final elements = this.elements;
     elements.clear();
     elements.addAll(value);
   }
 
   ElementList get elements() => new _ChildrenElementList._wrap(this);
 
   ElementList queryAll(String selectors) =>
-    new _FrozenElementList._wrap(_querySelectorAll(selectors));
+    new _FrozenElementList._wrap($dom_querySelectorAll(selectors));
 
   Set<String> get classes() {
     if (_cssClassSet === null) {
       _cssClassSet = new _CssClassSet(this);
     }
     return _cssClassSet;
   }
 
   void set classes(Collection<String> value) {
     _CssClassSet classSet = classes;
@@ skipping 22 matching lines @@
         new Completer<ElementRect>());
   }
 
   Future<CSSStyleDeclaration> get computedStyle() {
      // TODO(jacobr): last param should be null, see b/5045788
      return getComputedStyle('');
   }
 
   Future<CSSStyleDeclaration> getComputedStyle(String pseudoElement) {
     return _createMeasurementFuture(
-        () => _window._getComputedStyle(this, pseudoElement),
+        () => _window.$dom_getComputedStyle(this, pseudoElement),
         new Completer<CSSStyleDeclaration>());
   }
 
   _ElementEventsImpl get on() =>
     new _ElementEventsImpl(this);
 
   static final int ALLOW_KEYBOARD_INPUT = 1;
 
-  int get _childElementCount() native "return this.childElementCount;";
+  int get $dom_childElementCount() native "return this.childElementCount;";
 
-  _HTMLCollectionImpl get _children() native "return this.children;";
+  _HTMLCollectionImpl get $dom_children() native "return this.children;";
 
-  String get _className() native "return this.className;";
+  String get $dom_className() native "return this.className;";
 
-  void set _className(String value) native "this.className = value;";
+  void set $dom_className(String value) native "this.className = value;";
 
-  int get _clientHeight() native "return this.clientHeight;";
+  int get $dom_clientHeight() native "return this.clientHeight;";
 
-  int get _clientLeft() native "return this.clientLeft;";
+  int get $dom_clientLeft() native "return this.clientLeft;";
 
-  int get _clientTop() native "return this.clientTop;";
+  int get $dom_clientTop() native "return this.clientTop;";
 
-  int get _clientWidth() native "return this.clientWidth;";
+  int get $dom_clientWidth() native "return this.clientWidth;";
 
   String contentEditable;
 
   String dir;
 
   bool draggable;
 
-  _ElementImpl get _firstElementChild() native "return this.firstElementChild;";
+  _ElementImpl get $dom_firstElementChild() native "return this.firstElementChild;";
 
   bool hidden;
 
   String id;
 
   String innerHTML;
 
   final bool isContentEditable;
 
   String lang;
 
-  final _ElementImpl lastElementChild;
+  _ElementImpl get $dom_lastElementChild() native "return this.lastElementChild;";
 
   final _ElementImpl nextElementSibling;
 
-  int get _offsetHeight() native "return this.offsetHeight;";
+  int get $dom_offsetHeight() native "return this.offsetHeight;";
 
-  int get _offsetLeft() native "return this.offsetLeft;";
+  int get $dom_offsetLeft() native "return this.offsetLeft;";
 
   final _ElementImpl offsetParent;
 
-  int get _offsetTop() native "return this.offsetTop;";
+  int get $dom_offsetTop() native "return this.offsetTop;";
 
-  int get _offsetWidth() native "return this.offsetWidth;";
+  int get $dom_offsetWidth() native "return this.offsetWidth;";
 
   final String outerHTML;
 
   final _ElementImpl previousElementSibling;
 
-  int get _scrollHeight() native "return this.scrollHeight;";
+  int get $dom_scrollHeight() native "return this.scrollHeight;";
 
-  int get _scrollLeft() native "return this.scrollLeft;";
+  int get $dom_scrollLeft() native "return this.scrollLeft;";
 
-  void set _scrollLeft(int value) native "this.scrollLeft = value;";
+  void set $dom_scrollLeft(int value) native "this.scrollLeft = value;";
 
-  int get _scrollTop() native "return this.scrollTop;";
+  int get $dom_scrollTop() native "return this.scrollTop;";
 
-  void set _scrollTop(int value) native "this.scrollTop = value;";
+  void set $dom_scrollTop(int value) native "this.scrollTop = value;";
 
-  int get _scrollWidth() native "return this.scrollWidth;";
+  int get $dom_scrollWidth() native "return this.scrollWidth;";
 
   bool spellcheck;
 
   final _CSSStyleDeclarationImpl style;
 
   int tabIndex;
 
   final String tagName;
 
   String title;
 
   bool translate;
 
   final String webkitRegionOverflow;
 
   String webkitdropzone;
 
   void blur() native;
 
   void click() native;
 
   void focus() native;
 
-  String _getAttribute(String name) native "return this.getAttribute(name);";
+  String $dom_getAttribute(String name) native "return this.getAttribute(name);";
 
-  _ClientRectImpl _getBoundingClientRect() native "return this.getBoundingClientRect();";
+  _ClientRectImpl $dom_getBoundingClientRect() native "return this.getBoundingClientRect();";
 
-  _ClientRectListImpl _getClientRects() native "return this.getClientRects();";
+  _ClientRectListImpl $dom_getClientRects() native "return this.getClientRects();";
 
-  bool _hasAttribute(String name) native "return this.hasAttribute(name);";
+  _NodeListImpl $dom_getElementsByClassName(String name) native "return this.getElementsByClassName(name);";
+
+  _NodeListImpl $dom_getElementsByTagName(String name) native "return this.getElementsByTagName(name);";
+
+  bool $dom_hasAttribute(String name) native "return this.hasAttribute(name);";
 
   _ElementImpl insertAdjacentElement(String where, _ElementImpl element) native;
 
   void insertAdjacentHTML(String where, String html) native;
 
   void insertAdjacentText(String where, String text) native;
 
   _ElementImpl query(String selectors) native "return this.querySelector(selectors);";
 
-  _NodeListImpl _querySelectorAll(String selectors) native "return this.querySelectorAll(selectors);";
+  _NodeListImpl $dom_querySelectorAll(String selectors) native "return this.querySelectorAll(selectors);";
 
-  void _removeAttribute(String name) native "this.removeAttribute(name);";
+  void $dom_removeAttribute(String name) native "this.removeAttribute(name);";
 
   void scrollByLines(int lines) native;
 
   void scrollByPages(int pages) native;
 
   void scrollIntoView([bool centerIfNeeded = null]) native "this.scrollIntoViewIfNeeded(centerIfNeeded);";
 
-  void _setAttribute(String name, String value) native "this.setAttribute(name, value);";
+  void $dom_setAttribute(String name, String value) native "this.setAttribute(name, value);";
 
   bool matchesSelector(String selectors) native "return this.webkitMatchesSelector(selectors);";
 
   void webkitRequestFullScreen(int flags) native;
 
   void webkitRequestFullscreen() native;
 
 }
 
+final _START_TAG_REGEXP = const RegExp('<(\\w+)');
+class _ElementFactoryProvider {
+  static final _CUSTOM_PARENT_TAG_MAP = const {
+    'body' : 'html',
+    'head' : 'html',
+    'caption' : 'table',
+    'td': 'tr',
+    'colgroup': 'table',
+    'col' : 'colgroup',
+    'tr' : 'tbody',
+    'tbody' : 'table',
+    'tfoot' : 'table',
+    'thead' : 'table',
+    'track' : 'audio',
+  };
+
+  /** @domName Document.createElement */
+  factory Element.html(String html) {
+    // TODO(jacobr): this method can be made more robust and performant.
+    // 1) Cache the dummy parent elements required to use innerHTML rather than
+    //    creating them every call.
+    // 2) Verify that the html does not contain leading or trailing text nodes.
+    // 3) Verify that the html does not contain both <head> and <body> tags.
+    // 4) Detatch the created element from its dummy parent.
+    String parentTag = 'div';
+    String tag;
+    final match = _START_TAG_REGEXP.firstMatch(html);
+    if (match !== null) {
+      tag = match.group(1).toLowerCase();
+      if (_CUSTOM_PARENT_TAG_MAP.containsKey(tag)) {
+        parentTag = _CUSTOM_PARENT_TAG_MAP[tag];
+      }
+    }
+    final _ElementImpl temp = new Element.tag(parentTag);
+    temp.innerHTML = html;
+
+    Element element;
+    if (temp.elements.length == 1) {
+      element = temp.elements.first;
+    } else if (parentTag == 'html' && temp.elements.length == 2) {
+      // Work around for edge case in WebKit and possibly other browsers where
+      // both body and head elements are created even though the inner html
+      // only contains a head or body element.
+      element = temp.elements[tag == 'head' ? 0 : 1];
+    } else {
+      throw new IllegalArgumentException('HTML had ${temp.elements.length} ' +
+          'top level elements but 1 expected');
+    }
+    element.remove();
+    return element;
+  }
+
+  /** @domName Document.createElement */
+  // Optimization to improve performance until the frog compiler inlines this
+  // method.
+  factory Element.tag(String tag) native "return document.createElement(tag)";
+}
+
 class _ElementEventsImpl extends _EventsImpl implements ElementEvents {
   _ElementEventsImpl(_ptr) : super(_ptr);
 
   EventListenerList get abort() => _get('abort');
 
   EventListenerList get beforeCopy() => _get('beforecopy');
 
   EventListenerList get beforeCut() => _get('beforecut');
 
   EventListenerList get beforePaste() => _get('beforepaste');
@@ skipping 250 matching lines @@
   static final int SELECT = 16384;
 
   final bool bubbles;
 
   bool cancelBubble;
 
   final bool cancelable;
 
   final _ClipboardImpl clipboardData;
 
-  _EventTargetImpl get currentTarget() => _FixHtmlDocumentReference(_currentTarget);
-
-  _EventTargetImpl get _currentTarget() native "return this.currentTarget;";
+  final _EventTargetImpl currentTarget;
 
   final bool defaultPrevented;
 
   final int eventPhase;
 
   bool returnValue;
 
-  _EventTargetImpl get srcElement() => _FixHtmlDocumentReference(_srcElement);
+  final _EventTargetImpl srcElement;
 
-  _EventTargetImpl get _srcElement() native "return this.srcElement;";
-
-  _EventTargetImpl get target() => _FixHtmlDocumentReference(_target);
-
-  _EventTargetImpl get _target() native "return this.target;";
+  final _EventTargetImpl target;
 
   final int timeStamp;
 
   final String type;
 
-  void _initEvent(String eventTypeArg, bool canBubbleArg, bool cancelableArg) native "this.initEvent(eventTypeArg, canBubbleArg, cancelableArg);";
+  void $dom_initEvent(String eventTypeArg, bool canBubbleArg, bool cancelableArg) native "this.initEvent(eventTypeArg, canBubbleArg, cancelableArg);";
 
   void preventDefault() native;
 
   void stopImmediatePropagation() native;
 
   void stopPropagation() native;
 }
 
 class _EventExceptionImpl implements EventException native "*EventException" {
 
@@ skipping 20 matching lines @@
   static final int CONNECTING = 0;
 
   static final int OPEN = 1;
 
   final String URL;
 
   final int readyState;
 
   final String url;
 
-  void _addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
 
   void close() native;
 
-  bool _dispatchEvent(_EventImpl evt) native "return this.dispatchEvent(evt);";
+  bool $dom_dispatchEvent(_EventImpl evt) native "return this.dispatchEvent(evt);";
 
-  void _removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
 }
 
 class _EventSourceEventsImpl extends _EventsImpl implements EventSourceEvents {
   _EventSourceEventsImpl(_ptr) : super(_ptr);
 
   EventListenerList get error() => _get('error');
 
   EventListenerList get message() => _get('message');
 
   EventListenerList get open() => _get('open');
@@ skipping 36 matching lines @@
   _EventListenerListImpl remove(EventListener listener,
       [bool useCapture = false]) {
     _remove(listener, useCapture);
     return this;
   }
 
   bool dispatch(Event evt) {
     // TODO(jacobr): what is the correct behavior here. We could alternately
     // force the event to have the expected type.
     assert(evt.type == _type);
-    return _ptr._dispatchEvent(evt);
+    return _ptr.$dom_dispatchEvent(evt);
   }
 
   void _add(EventListener listener, bool useCapture) {
-    _ptr._addEventListener(_type, listener, useCapture);
+    _ptr.$dom_addEventListener(_type, listener, useCapture);
   }
 
   void _remove(EventListener listener, bool useCapture) {
-    _ptr._removeEventListener(_type, listener, useCapture);
+    _ptr.$dom_removeEventListener(_type, listener, useCapture);
   }
 }
 
 
 class _EventTargetImpl implements EventTarget native "*EventTarget" {
 
   Events get on() => new _EventsImpl(this);
 
-  void _addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
 
-  bool _dispatchEvent(_EventImpl event) native "return this.dispatchEvent(event);";
+  bool $dom_dispatchEvent(_EventImpl event) native "return this.dispatchEvent(event);";
 
-  void _removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
 
 }
 
 class _FieldSetElementImpl extends _ElementImpl implements FieldSetElement native "*HTMLFieldSetElement" {
 
   final _FormElementImpl form;
 
   String name;
 
   final String type;
@@ skipping 420 matching lines @@
 
   bool checkValidity() native;
 
   void reset() native;
 
   void submit() native;
 }
 
 class _FrameElementImpl extends _ElementImpl implements FrameElement native "*HTMLFrameElement" {
 
-  _DocumentImpl get contentDocument() => _FixHtmlDocumentReference(_contentDocument);
-
-  _EventTargetImpl get _contentDocument() native "return this.contentDocument;";
+  final _DocumentImpl contentDocument;
 
   final _WindowImpl contentWindow;
 
   String frameBorder;
 
   final int height;
 
   String location;
 
   String longDesc;
@@ skipping 222 matching lines @@
   void back() native;
 
   void forward() native;
 
   void go(int distance) native;
 
   void pushState(Object data, String title, [String url = null]) native;
 
   void replaceState(Object data, String title, [String url = null]) 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.
 
-class _HtmlElementImpl extends _ElementImpl implements HtmlElement
-    native "*IntentionallyInvalid" {
-
+class _HtmlElementImpl extends _ElementImpl implements HtmlElement native "*HTMLHtmlElement" {
 }
 
 class _IDBAnyImpl implements IDBAny native "*IDBAny" {
 }
 
 class _IDBCursorImpl implements IDBCursor native "*IDBCursor" {
 
   static final int NEXT = 0;
 
   static final int NEXT_NO_DUPLICATE = 1;
@@ skipping 249 matching lines @@
 
 class _IDBVersionChangeRequestImpl extends _IDBRequestImpl implements IDBVersionChangeRequest native "*IDBVersionChangeRequest" {
 
   EventListener onblocked;
 }
 
 class _IFrameElementImpl extends _ElementImpl implements IFrameElement native "*HTMLIFrameElement" {
 
   String align;
 
-  _DocumentImpl get contentDocument() => _FixHtmlDocumentReference(_contentDocument);
-
-  _EventTargetImpl get _contentDocument() native "return this.contentDocument;";
+  final _DocumentImpl contentDocument;
 
   final _WindowImpl contentWindow;
 
   String frameBorder;
 
   String height;
 
   String longDesc;
 
   String marginHeight;
@@ skipping 1022 matching lines @@
   void initMessageEvent(String typeArg, bool canBubbleArg, bool cancelableArg, Object dataArg, String originArg, String lastEventIdArg, _WindowImpl sourceArg, List messagePorts) native;
 
   void webkitInitMessageEvent(String typeArg, bool canBubbleArg, bool cancelableArg, Object dataArg, String originArg, String lastEventIdArg, _WindowImpl sourceArg, List transferables) native;
 }
 
 class _MessagePortImpl extends _EventTargetImpl implements MessagePort native "*MessagePort" {
 
   _MessagePortEventsImpl get on() =>
     new _MessagePortEventsImpl(this);
 
-  void _addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
 
   void close() native;
 
-  bool _dispatchEvent(_EventImpl evt) native "return this.dispatchEvent(evt);";
+  bool $dom_dispatchEvent(_EventImpl evt) native "return this.dispatchEvent(evt);";
 
   void postMessage(String message, [List messagePorts = null]) native;
 
-  void _removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
 
   void start() native;
 
   void webkitPostMessage(String message, [List transfer = null]) native;
 }
 
 class _MessagePortEventsImpl extends _EventsImpl implements MessagePortEvents {
   _MessagePortEventsImpl(_ptr) : super(_ptr);
 
   EventListenerList get message() => _get('message');
@@ skipping 56 matching lines @@
   final _ClipboardImpl dataTransfer;
 
   final _NodeImpl fromElement;
 
   final bool metaKey;
 
   final int offsetX;
 
   final int offsetY;
 
-  _EventTargetImpl get relatedTarget() => _FixHtmlDocumentReference(_relatedTarget);
-
-  _EventTargetImpl get _relatedTarget() native "return this.relatedTarget;";
+  final _EventTargetImpl relatedTarget;
 
   final int screenX;
 
   final int screenY;
 
   final bool shiftKey;
 
   final _NodeImpl toElement;
 
   final int x;
 
   final int y;
 
-  void _initMouseEvent(String type, bool canBubble, bool cancelable, _WindowImpl view, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, int button, _EventTargetImpl relatedTarget) native "this.initMouseEvent(type, canBubble, cancelable, view, detail, screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey, metaKey, button, relatedTarget);";
+  void $dom_initMouseEvent(String type, bool canBubble, bool cancelable, _WindowImpl view, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, int button, _EventTargetImpl relatedTarget) native "this.initMouseEvent(type, canBubble, cancelable, view, detail, screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey, metaKey, button, relatedTarget);";
 }
 
 class _MutationEventImpl extends _EventImpl implements MutationEvent native "*MutationEvent" {
 
   static final int ADDITION = 2;
 
   static final int MODIFICATION = 1;
 
   static final int REMOVAL = 3;
 
@@ skipping 146 matching lines @@
 class _NavigatorUserMediaErrorImpl implements NavigatorUserMediaError native "*NavigatorUserMediaError" {
 
   static final int PERMISSION_DENIED = 1;
 
   final int code;
 }
 // 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.
 
+/**
+ * Lazy implementation of the child nodes of an element that does not request
+ * the actual child nodes of an element until strictly necessary greatly
+ * improving performance for the typical cases where it is not required.
+ */
+class _ChildNodeListLazy implements NodeList {
+  final _NodeImpl _this;
+
+  _ChildNodeListLazy(this._this);
+
+
+  _NodeImpl get first() native "return this._this.firstChild;";
+  _NodeImpl last() native "return this._this.lastChild;";
+
+  void add(_NodeImpl value) {
+    _this.$dom_appendChild(value);
+  }
+
+  void addLast(_NodeImpl value) {
+    _this.$dom_appendChild(value);
+  }
+
+
+  void addAll(Collection<_NodeImpl> collection) {
+    for (_NodeImpl node in collection) {
+      _this.$dom_appendChild(node);
+    }
+  }
+
+  _NodeImpl removeLast() {
+    final last = last();
+    if (last != null) {
+      _this.$dom_removeChild(last);
+    }
+    return last;
+  }
+
+  void clear() {
+    _this.text = '';
+  }
+
+  void operator []=(int index, _NodeImpl value) {
+    _this.$dom_replaceChild(value, this[index]);
+  }
+
+  Iterator<Node> iterator() => _this.$dom_childNodes.iterator();
+
+  // TODO(jacobr): We can implement these methods much more efficiently by
+  // looking up the nodeList only once instead of once per iteration.
+  void forEach(void f(Node element)) => _Collections.forEach(this, f);
+
+  Collection map(f(Node element)) => _Collections.map(this, [], f);
+
+  Collection<Node> filter(bool f(Node element)) =>
+     new _NodeListWrapper(_Collections.filter(this, <Node>[], f));
+
+  bool every(bool f(Node element)) => _Collections.every(this, f);
+
+  bool some(bool f(Node element)) => _Collections.some(this, f);
+
+  bool isEmpty() => this.length == 0;
+
+  // From List<Node>:
+
+  // TODO(jacobr): this could be implemented for child node lists.
+  // The exception we throw here is misleading.
+  void sort(int compare(Node a, Node b)) {
+    throw new UnsupportedOperationException("Cannot sort immutable List.");
+  }
+
+  int indexOf(Node element, [int start = 0]) =>
+      _Lists.indexOf(this, element, start, this.length);
+
+  int lastIndexOf(Node element, [int start = 0]) =>
+      _Lists.lastIndexOf(this, element, start);
+
+  // FIXME: implement thesee.
+  void setRange(int start, int length, List<Node> from, [int startFrom]) {
+    throw new UnsupportedOperationException(
+        "Cannot setRange on immutable List.");
+  }
+  void removeRange(int start, int length) {
+    throw new UnsupportedOperationException(
+        "Cannot removeRange on immutable List.");
+  }
+  void insertRange(int start, int length, [Node initialValue]) {
+    throw new UnsupportedOperationException(
+        "Cannot insertRange on immutable List.");
+  }
+  NodeList getRange(int start, int length) =>
+    new _NodeListWrapper(_Lists.getRange(this, start, length, <Node>[]));
+
+  // -- end List<Node> mixins.
+
+  // TODO(jacobr): benchmark whether this is more efficient or whether caching
+  // a local copy of $dom_childNodes is more efficient.
+  int get length() => _this.$dom_childNodes.length;
+
+  _NodeImpl operator[](int index) => _this.$dom_childNodes[index];
+}
+
 class _NodeImpl extends _EventTargetImpl implements Node native "*Node" {
-  _NodeListImpl get nodes() {
-    final list = _childNodes;
-    list._parent = this;
-    return list;
+  _ChildNodeListLazy get nodes() {
+    return new _ChildNodeListLazy(this);
   }
 
   void set nodes(Collection<Node> value) {
     // Copy list first since we don't want liveness during iteration.
     // TODO(jacobr): there is a better way to do this.
     List copy = new List.from(value);
     text = '';
     for (Node node in copy) {
-      _appendChild(node);
+      $dom_appendChild(node);
     }
   }
 
   // TODO(jacobr): should we throw an exception if parent is already null?
   _NodeImpl remove() {
     if (this.parent != null) {
       final _NodeImpl parent = this.parent;
-      parent._removeChild(this);
+      parent.$dom_removeChild(this);
     }
     return this;
   }
 
   _NodeImpl replaceWith(Node otherNode) {
     try {
       final _NodeImpl parent = this.parent;
-      parent._replaceChild(otherNode, this);
+      parent.$dom_replaceChild(otherNode, this);
     } catch(var e) {
       
     };
     return this;
   }
 
 
   static final int ATTRIBUTE_NODE = 2;
 
   static final int CDATA_SECTION_NODE = 4;
@@ skipping 23 matching lines @@
   static final int ENTITY_NODE = 6;
 
   static final int ENTITY_REFERENCE_NODE = 5;
 
   static final int NOTATION_NODE = 12;
 
   static final int PROCESSING_INSTRUCTION_NODE = 7;
 
   static final int TEXT_NODE = 3;
 
-  _NamedNodeMapImpl get _attributes() native "return this.attributes;";
+  _NamedNodeMapImpl get $dom_attributes() native "return this.attributes;";
 
-  _NodeListImpl get _childNodes() native "return this.childNodes;";
+  _NodeListImpl get $dom_childNodes() native "return this.childNodes;";
+
+  _NodeImpl get $dom_firstChild() native "return this.firstChild;";
+
+  _NodeImpl get $dom_lastChild() native "return this.lastChild;";
 
   _NodeImpl get nextNode() native "return this.nextSibling;";
 
-  _DocumentImpl get document() => _FixHtmlDocumentReference(_document);
+  int get $dom_nodeType() native "return this.nodeType;";
 
-  _EventTargetImpl get _document() native "return this.ownerDocument;";
+  _DocumentImpl get document() native "return this.ownerDocument;";
 
   _NodeImpl get parent() native "return this.parentNode;";
 
   _NodeImpl get previousNode() native "return this.previousSibling;";
 
   String get text() native "return this.textContent;";
 
   void set text(String value) native "this.textContent = value;";
 
-  _NodeImpl _appendChild(_NodeImpl newChild) native "return this.appendChild(newChild);";
+  _NodeImpl $dom_appendChild(_NodeImpl newChild) native "return this.appendChild(newChild);";
 
   _NodeImpl clone(bool deep) native "return this.cloneNode(deep);";
 
   bool contains(_NodeImpl other) native;
 
   bool hasChildNodes() native;
 
   _NodeImpl insertBefore(_NodeImpl newChild, _NodeImpl refChild) native;
 
-  _NodeImpl _removeChild(_NodeImpl oldChild) native "return this.removeChild(oldChild);";
+  _NodeImpl $dom_removeChild(_NodeImpl oldChild) native "return this.removeChild(oldChild);";
 
-  _NodeImpl _replaceChild(_NodeImpl newChild, _NodeImpl oldChild) native "return this.replaceChild(newChild, oldChild);";
+  _NodeImpl $dom_replaceChild(_NodeImpl newChild, _NodeImpl oldChild) native "return this.replaceChild(newChild, oldChild);";
 
 }
 
 class _NodeFilterImpl implements NodeFilter native "*NodeFilter" {
 
   static final int FILTER_ACCEPT = 1;
 
   static final int FILTER_REJECT = 2;
 
   static final int FILTER_SKIP = 3;
@@ skipping 137 matching lines @@
   Iterator<Node> iterator() {
     // Note: NodeLists are not fixed size. And most probably length shouldn't
     // be cached in both iterator _and_ forEach method. For now caching it
     // for consistency.
     return new _FixedSizeListIterator<Node>(this);
   }
 
   // From Collection<Node>:
 
   void add(_NodeImpl value) {
-    _parent._appendChild(value);
+    _parent.$dom_appendChild(value);
   }
 
   void addLast(_NodeImpl value) {
-    _parent._appendChild(value);
+    _parent.$dom_appendChild(value);
   }
 
   void addAll(Collection<_NodeImpl> collection) {
     for (_NodeImpl node in collection) {
-      _parent._appendChild(node);      
+      _parent.$dom_appendChild(node);      
     }
   }
 
   _NodeImpl removeLast() {
     final last = this.last();
     if (last != null) {
-      _parent._removeChild(last);
+      _parent.$dom_removeChild(last);
     }
     return last;
   }
 
   void clear() {
     _parent.text = '';
   }
 
   void operator []=(int index, _NodeImpl value) {
-    _parent._replaceChild(value, this[index]);
+    _parent.$dom_replaceChild(value, this[index]);
   }
 
   void forEach(void f(Node element)) => _Collections.forEach(this, f);
 
   Collection map(f(Node element)) => _Collections.map(this, [], f);
 
   Collection<Node> filter(bool f(Node element)) =>
      new _NodeListWrapper(_Collections.filter(this, <Node>[], f));
 
   bool every(bool f(Node element)) => _Collections.every(this, f);
@@ skipping 36 matching lines @@
   final int length;
 
   _NodeImpl operator[](int index) native "return this[index];";
 
 }
 
 class _NodeSelectorImpl implements NodeSelector native "*NodeSelector" {
 
   _ElementImpl query(String selectors) native "return this.querySelector(selectors);";
 
-  _NodeListImpl _querySelectorAll(String selectors) native "return this.querySelectorAll(selectors);";
+  _NodeListImpl $dom_querySelectorAll(String selectors) native "return this.querySelectorAll(selectors);";
 }
 
 class _NotationImpl extends _NodeImpl implements Notation native "*Notation" {
 
   final String publicId;
 
   final String systemId;
 }
 
 class _NotificationImpl extends _EventTargetImpl implements Notification native "*Notification" {
@@ skipping 72 matching lines @@
   String archive;
 
   String border;
 
   String code;
 
   String codeBase;
 
   String codeType;
 
-  _DocumentImpl get contentDocument() => _FixHtmlDocumentReference(_contentDocument);
-
-  _EventTargetImpl get _contentDocument() native "return this.contentDocument;";
+  final _DocumentImpl contentDocument;
 
   String data;
 
   bool declare;
 
   final _FormElementImpl form;
 
   String height;
 
   int hspace;
@@ skipping 564 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGTransformable
 
   final _SVGAnimatedTransformListImpl transform;
 
@@ skipping 208 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGTransformable
 
   final _SVGAnimatedTransformListImpl transform;
 
@@ skipping 31 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGTransformable
 
   final _SVGAnimatedTransformListImpl transform;
 
@@ skipping 104 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGTransformable
 
   final _SVGAnimatedTransformListImpl transform;
 
@@ skipping 15 matching lines @@
 class _SVGDescElementImpl extends _SVGElementImpl implements SVGDescElement native "*SVGDescElement" {
 
   // From SVGLangSpace
 
   String xmllang;
 
   String xmlspace;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGDocumentImpl extends _DocumentImpl implements SVGDocument native "*SVGDocument" {
 
   final _SVGSVGElementImpl rootElement;
 
-  _EventImpl _createEvent(String eventType) native "return this.createEvent(eventType);";
+  _EventImpl $dom_createEvent(String eventType) native "return this.createEvent(eventType);";
 }
 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class _AttributeClassSet extends _CssClassSet {
   _AttributeClassSet(element) : super(element);
 
-  String _className() => _element.attributes['class'];
+  String $dom_className() => _element.attributes['class'];
 
   void _write(Set s) {
     _element.attributes['class'] = _formatSet(s);
   }
 }
 
 class _SVGElementImpl extends _ElementImpl implements SVGElement native "*SVGElement" {
   Set<String> get classes() {
     if (_cssClassSet === null) {
       _cssClassSet = new _AttributeClassSet(_ptr);
@@ skipping 59 matching lines @@
   final _SVGElementInstanceImpl firstChild;
 
   final _SVGElementInstanceImpl lastChild;
 
   final _SVGElementInstanceImpl nextSibling;
 
   final _SVGElementInstanceImpl parentNode;
 
   final _SVGElementInstanceImpl previousSibling;
 
-  void _addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
 
-  bool _dispatchEvent(_EventImpl event) native "return this.dispatchEvent(event);";
+  bool $dom_dispatchEvent(_EventImpl event) native "return this.dispatchEvent(event);";
 
-  void _removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
 }
 
 class _SVGElementInstanceEventsImpl extends _EventsImpl implements SVGElementInstanceEvents {
   _SVGElementInstanceEventsImpl(_ptr) : super(_ptr);
 
   EventListenerList get abort() => _get('abort');
 
   EventListenerList get beforeCopy() => _get('beforecopy');
 
   EventListenerList get beforeCut() => _get('beforecut');
@@ skipping 105 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGTransformable
 
   final _SVGAnimatedTransformListImpl transform;
 
@@ skipping 61 matching lines @@
   final _SVGAnimatedStringImpl result;
 
   final _SVGAnimatedLengthImpl width;
 
   final _SVGAnimatedLengthImpl x;
 
   final _SVGAnimatedLengthImpl y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGFEColorMatrixElementImpl extends _SVGElementImpl implements SVGFEColorMatrixElement native "*SVGFEColorMatrixElement" {
 
   static final int SVG_FECOLORMATRIX_TYPE_HUEROTATE = 3;
@@ skipping 19 matching lines @@
   final _SVGAnimatedStringImpl result;
 
   final _SVGAnimatedLengthImpl width;
 
   final _SVGAnimatedLengthImpl x;
 
   final _SVGAnimatedLengthImpl y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGFEComponentTransferElementImpl extends _SVGElementImpl implements SVGFEComponentTransferElement native "*SVGFEComponentTransferElement" {
 
   final _SVGAnimatedStringImpl in1;
 
   // From SVGFilterPrimitiveStandardAttributes
 
   final _SVGAnimatedLengthImpl height;
 
   final _SVGAnimatedStringImpl result;
 
   final _SVGAnimatedLengthImpl width;
 
   final _SVGAnimatedLengthImpl x;
 
   final _SVGAnimatedLengthImpl y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGFECompositeElementImpl extends _SVGElementImpl implements SVGFECompositeElement native "*SVGFECompositeElement" {
 
   static final int SVG_FECOMPOSITE_OPERATOR_ARITHMETIC = 6;
@@ skipping 31 matching lines @@
   final _SVGAnimatedStringImpl result;
 
   final _SVGAnimatedLengthImpl width;
 
   final _SVGAnimatedLengthImpl x;
 
   final _SVGAnimatedLengthImpl y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGFEConvolveMatrixElementImpl extends _SVGElementImpl implements SVGFEConvolveMatrixElement native "*SVGFEConvolveMatrixElement" {
 
   static final int SVG_EDGEMODE_DUPLICATE = 1;
@@ skipping 35 matching lines @@
   final _SVGAnimatedStringImpl result;
 
   final _SVGAnimatedLengthImpl width;
 
   final _SVGAnimatedLengthImpl x;
 
   final _SVGAnimatedLengthImpl y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGFEDiffuseLightingElementImpl extends _SVGElementImpl implements SVGFEDiffuseLightingElement native "*SVGFEDiffuseLightingElement" {
 
   final _SVGAnimatedNumberImpl diffuseConstant;
@@ skipping 13 matching lines @@
   final _SVGAnimatedStringImpl result;
 
   final _SVGAnimatedLengthImpl width;
 
   final _SVGAnimatedLengthImpl x;
 
   final _SVGAnimatedLengthImpl y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGFEDisplacementMapElementImpl extends _SVGElementImpl implements SVGFEDisplacementMapElement native "*SVGFEDisplacementMapElement" {
 
   static final int SVG_CHANNEL_A = 4;
@@ skipping 23 matching lines @@
   final _SVGAnimatedStringImpl result;
 
   final _SVGAnimatedLengthImpl width;
 
   final _SVGAnimatedLengthImpl x;
 
   final _SVGAnimatedLengthImpl y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGFEDistantLightElementImpl extends _SVGElementImpl implements SVGFEDistantLightElement native "*SVGFEDistantLightElement" {
 
   final _SVGAnimatedNumberImpl azimuth;
@@ skipping 22 matching lines @@
   final _SVGAnimatedStringImpl result;
 
   final _SVGAnimatedLengthImpl width;
 
   final _SVGAnimatedLengthImpl x;
 
   final _SVGAnimatedLengthImpl y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGFEFloodElementImpl extends _SVGElementImpl implements SVGFEFloodElement native "*SVGFEFloodElement" {
 
   // From SVGFilterPrimitiveStandardAttributes
 
   final _SVGAnimatedLengthImpl height;
 
   final _SVGAnimatedStringImpl result;
 
   final _SVGAnimatedLengthImpl width;
 
   final _SVGAnimatedLengthImpl x;
 
   final _SVGAnimatedLengthImpl y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGFEFuncAElementImpl extends _SVGComponentTransferFunctionElementImpl implements SVGFEFuncAElement native "*SVGFEFuncAElement" {
 }
 
@@ skipping 23 matching lines @@
   final _SVGAnimatedStringImpl result;
 
   final _SVGAnimatedLengthImpl width;
 
   final _SVGAnimatedLengthImpl x;
 
   final _SVGAnimatedLengthImpl y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGFEImageElementImpl extends _SVGElementImpl implements SVGFEImageElement native "*SVGFEImageElement" {
 
   final _SVGAnimatedPreserveAspectRatioImpl preserveAspectRatio;
@@ skipping 19 matching lines @@
   final _SVGAnimatedStringImpl result;
 
   final _SVGAnimatedLengthImpl width;
 
   final _SVGAnimatedLengthImpl x;
 
   final _SVGAnimatedLengthImpl y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGFEMergeElementImpl extends _SVGElementImpl implements SVGFEMergeElement native "*SVGFEMergeElement" {
 
   // From SVGFilterPrimitiveStandardAttributes
 
   final _SVGAnimatedLengthImpl height;
 
   final _SVGAnimatedStringImpl result;
 
   final _SVGAnimatedLengthImpl width;
 
   final _SVGAnimatedLengthImpl x;
 
   final _SVGAnimatedLengthImpl y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGFEMergeNodeElementImpl extends _SVGElementImpl implements SVGFEMergeNodeElement native "*SVGFEMergeNodeElement" {
 
   final _SVGAnimatedStringImpl in1;
@@ skipping 24 matching lines @@
   final _SVGAnimatedStringImpl result;
 
   final _SVGAnimatedLengthImpl width;
 
   final _SVGAnimatedLengthImpl x;
 
   final _SVGAnimatedLengthImpl y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGFEOffsetElementImpl extends _SVGElementImpl implements SVGFEOffsetElement native "*SVGFEOffsetElement" {
 
   final _SVGAnimatedNumberImpl dx;
 
   final _SVGAnimatedNumberImpl dy;
 
   final _SVGAnimatedStringImpl in1;
 
   // From SVGFilterPrimitiveStandardAttributes
 
   final _SVGAnimatedLengthImpl height;
 
   final _SVGAnimatedStringImpl result;
 
   final _SVGAnimatedLengthImpl width;
 
   final _SVGAnimatedLengthImpl x;
 
   final _SVGAnimatedLengthImpl y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGFEPointLightElementImpl extends _SVGElementImpl implements SVGFEPointLightElement native "*SVGFEPointLightElement" {
 
   final _SVGAnimatedNumberImpl x;
@@ skipping 20 matching lines @@
   final _SVGAnimatedStringImpl result;
 
   final _SVGAnimatedLengthImpl width;
 
   final _SVGAnimatedLengthImpl x;
 
   final _SVGAnimatedLengthImpl y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGFESpotLightElementImpl extends _SVGElementImpl implements SVGFESpotLightElement native "*SVGFESpotLightElement" {
 
   final _SVGAnimatedNumberImpl limitingConeAngle;
@@ skipping 24 matching lines @@
   final _SVGAnimatedStringImpl result;
 
   final _SVGAnimatedLengthImpl width;
 
   final _SVGAnimatedLengthImpl x;
 
   final _SVGAnimatedLengthImpl y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGFETurbulenceElementImpl extends _SVGElementImpl implements SVGFETurbulenceElement native "*SVGFETurbulenceElement" {
 
   static final int SVG_STITCHTYPE_NOSTITCH = 2;
@@ skipping 27 matching lines @@
   final _SVGAnimatedStringImpl result;
 
   final _SVGAnimatedLengthImpl width;
 
   final _SVGAnimatedLengthImpl x;
 
   final _SVGAnimatedLengthImpl y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGFilterElementImpl extends _SVGElementImpl implements SVGFilterElement native "*SVGFilterElement" {
 
   final _SVGAnimatedIntegerImpl filterResX;
@@ skipping 23 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGFilterPrimitiveStandardAttributesImpl extends _SVGStylableImpl implements SVGFilterPrimitiveStandardAttributes native "*SVGFilterPrimitiveStandardAttributes" {
 
   final _SVGAnimatedLengthImpl height;
@@ skipping 57 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGTransformable
 
   final _SVGAnimatedTransformListImpl transform;
 
@@ skipping 29 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGTransformable
 
   final _SVGAnimatedTransformListImpl transform;
 
@@ skipping 28 matching lines @@
   num x;
 
   num y;
 
   // From SVGURIReference
 
   final _SVGAnimatedStringImpl href;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGGradientElementImpl extends _SVGElementImpl implements SVGGradientElement native "*SVGGradientElement" {
 
   static final int SVG_SPREADMETHOD_PAD = 1;
@@ skipping 13 matching lines @@
   // From SVGURIReference
 
   final _SVGAnimatedStringImpl href;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGHKernElementImpl extends _SVGElementImpl implements SVGHKernElement native "*SVGHKernElement" {
 }
 
@@ skipping 28 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGTransformable
 
   final _SVGAnimatedTransformListImpl transform;
 
@@ skipping 100 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGTransformable
 
   final _SVGAnimatedTransformListImpl transform;
 
@@ skipping 86 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGFitToViewBox
 
   final _SVGAnimatedPreserveAspectRatioImpl preserveAspectRatio;
 
@@ skipping 29 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGMatrixImpl implements SVGMatrix native "*SVGMatrix" {
 
   num a;
@@ skipping 163 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGTransformable
 
   final _SVGAnimatedTransformListImpl transform;
 
@@ skipping 286 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGFitToViewBox
 
   final _SVGAnimatedPreserveAspectRatioImpl preserveAspectRatio;
 
@@ skipping 49 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGTransformable
 
   final _SVGAnimatedTransformListImpl transform;
 
@@ skipping 33 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGTransformable
 
   final _SVGAnimatedTransformListImpl transform;
 
@@ skipping 100 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGTransformable
 
   final _SVGAnimatedTransformListImpl transform;
 
@@ skipping 118 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGLocatable
 
   final _SVGElementImpl farthestViewportElement;
 
@@ skipping 33 matching lines @@
 
 class _SVGSetElementImpl extends _SVGAnimationElementImpl implements SVGSetElement native "*SVGSetElement" {
 }
 
 class _SVGStopElementImpl extends _SVGElementImpl implements SVGStopElement native "*SVGStopElement" {
 
   final _SVGAnimatedNumberImpl offset;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGStringListImpl implements SVGStringList native "*SVGStringList" {
 
   final int numberOfItems;
 
   String appendItem(String item) native;
 
   void clear() native;
 
   String getItem(int index) native;
 
   String initialize(String item) native;
 
   String insertItemBefore(String item, int index) native;
 
   String removeItem(int index) native;
 
   String replaceItem(String item, int index) native;
 }
 
 class _SVGStylableImpl implements SVGStylable native "*SVGStylable" {
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_svgClassName() native "return this.className;";
 
   final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGStyleElementImpl extends _SVGElementImpl implements SVGStyleElement native "*SVGStyleElement" {
 
   bool disabled;
 
@@ skipping 30 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGTransformable
 
   final _SVGAnimatedTransformListImpl transform;
 
@@ skipping 19 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGFitToViewBox
 
   final _SVGAnimatedPreserveAspectRatioImpl preserveAspectRatio;
 
@@ skipping 66 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGTextElementImpl extends _SVGTextPositioningElementImpl implements SVGTextElement native "*SVGTextElement" {
 
   // From SVGTransformable
@@ skipping 56 matching lines @@
 class _SVGTitleElementImpl extends _SVGElementImpl implements SVGTitleElement native "*SVGTitleElement" {
 
   // From SVGLangSpace
 
   String xmllang;
 
   String xmlspace;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 }
 
 class _SVGTransformImpl implements SVGTransform native "*SVGTransform" {
 
   static final int SVG_TRANSFORM_MATRIX = 1;
@@ skipping 104 matching lines @@
   String xmllang;
 
   String xmlspace;
 
   // From SVGExternalResourcesRequired
 
   final _SVGAnimatedBooleanImpl externalResourcesRequired;
 
   // From SVGStylable
 
-  _SVGAnimatedStringImpl get _svgClassName() native "return this.className;";
+  _SVGAnimatedStringImpl get $dom_$dom_svgClassName() native "return this.className;";
 
   // Use implementation from Element.
   // final _CSSStyleDeclarationImpl style;
 
   _CSSValueImpl getPresentationAttribute(String name) native;
 
   // From SVGTransformable
 
   final _SVGAnimatedTransformListImpl transform;
 
@@ skipping 869 matching lines @@
   final int identifier;
 
   final int pageX;
 
   final int pageY;
 
   final int screenX;
 
   final int screenY;
 
-  _EventTargetImpl get target() => _FixHtmlDocumentReference(_target);
-
-  _EventTargetImpl get _target() native "return this.target;";
+  final _EventTargetImpl target;
 
   final num webkitForce;
 
   final int webkitRadiusX;
 
   final int webkitRadiusY;
 
   final num webkitRotationAngle;
 }
 
@@ skipping 1522 matching lines @@
   final int bufferedAmount;
 
   final String extensions;
 
   final String protocol;
 
   final int readyState;
 
   final String url;
 
-  void _addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
 
   void close([int code = null, String reason = null]) native;
 
-  bool _dispatchEvent(_EventImpl evt) native "return this.dispatchEvent(evt);";
+  bool $dom_dispatchEvent(_EventImpl evt) native "return this.dispatchEvent(evt);";
 
-  void _removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
 
   bool send(String data) native;
 }
 
 class _WebSocketEventsImpl extends _EventsImpl implements WebSocketEvents {
   _WebSocketEventsImpl(_ptr) : super(_ptr);
 
   EventListenerList get close() => _get('close');
 
   EventListenerList get error() => _get('error');
@@ skipping 38 matching lines @@
   final int y;
 
   void initWebKitWheelEvent(int wheelDeltaX, int wheelDeltaY, _WindowImpl view, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey) 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.
 
 class _WindowImpl extends _EventTargetImpl implements Window native "@*DOMWindow" {
 
-  _DocumentImpl get document() native "return this.document.documentElement;";
+  _DocumentImpl get document() native "return this.document;";
 
   void requestLayoutFrame(TimeoutHandler callback) {
     _addMeasurementFrameCallback(callback);
   }
 
 
   _WindowEventsImpl get on() =>
     new _WindowEventsImpl(this);
 
   static final int PERSISTENT = 1;
@@ skipping 91 matching lines @@
   final _WindowImpl top;
 
   final _IDBFactoryImpl webkitIndexedDB;
 
   final _NotificationCenterImpl webkitNotifications;
 
   final _StorageInfoImpl webkitStorageInfo;
 
   final _WindowImpl window;
 
-  void _addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
 
   void alert(String message) native;
 
   String atob(String string) native;
 
   void blur() native;
 
   String btoa(String string) native;
 
   void captureEvents() native;
 
   void clearInterval(int handle) native;
 
   void clearTimeout(int handle) native;
 
   void close() native;
 
   bool confirm(String message) native;
 
-  bool _dispatchEvent(_EventImpl evt) native "return this.dispatchEvent(evt);";
+  bool $dom_dispatchEvent(_EventImpl evt) native "return this.dispatchEvent(evt);";
 
   bool find(String string, bool caseSensitive, bool backwards, bool wrap, bool wholeWord, bool searchInFrames, bool showDialog) native;
 
   void focus() native;
 
-  _CSSStyleDeclarationImpl _getComputedStyle(_ElementImpl element, String pseudoElement) native "return this.getComputedStyle(element, pseudoElement);";
+  _CSSStyleDeclarationImpl $dom_getComputedStyle(_ElementImpl element, String pseudoElement) native "return this.getComputedStyle(element, pseudoElement);";
 
   _CSSRuleListImpl getMatchedCSSRules(_ElementImpl element, String pseudoElement) native;
 
   _DOMSelectionImpl getSelection() native;
 
   _MediaQueryListImpl matchMedia(String query) native;
 
   void moveBy(num x, num y) native;
 
   void moveTo(num x, num y) native;
 
   _WindowImpl open(String url, String name, [String options = null]) native;
 
   _DatabaseImpl openDatabase(String name, String version, String displayName, int estimatedSize, [DatabaseCallback creationCallback = null]) native;
 
   void postMessage(Dynamic message, String targetOrigin, [List messagePorts = null]) native;
 
   void print() native;
 
   String prompt(String message, String defaultValue) native;
 
   void releaseEvents() native;
 
-  void _removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
 
   void resizeBy(num x, num y) native;
 
   void resizeTo(num width, num height) native;
 
   void scroll(int x, int y) native;
 
   void scrollBy(int x, int y) native;
 
   void scrollTo(int x, int y) native;
@@ skipping 297 matching lines @@
   final int readyState;
 
   final Object response;
 
   final _BlobImpl responseBlob;
 
   final String responseText;
 
   String responseType;
 
-  _DocumentImpl get responseXML() => _FixHtmlDocumentReference(_responseXML);
-
-  _EventTargetImpl get _responseXML() native "return this.responseXML;";
+  final _DocumentImpl responseXML;
 
   final int status;
 
   final String statusText;
 
   final _XMLHttpRequestUploadImpl upload;
 
   bool withCredentials;
 
   void abort() native;
 
-  void _addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
 
-  bool _dispatchEvent(_EventImpl evt) native "return this.dispatchEvent(evt);";
+  bool $dom_dispatchEvent(_EventImpl evt) native "return this.dispatchEvent(evt);";
 
   String getAllResponseHeaders() native;
 
   String getResponseHeader(String header) native;
 
   void open(String method, String url, [bool async = null, String user = null, String password = null]) native;
 
   void overrideMimeType(String override) native;
 
-  void _removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
 
   void send([var data = null]) native;
 
   void setRequestHeader(String header, String value) native;
 }
 
 class _XMLHttpRequestEventsImpl extends _EventsImpl implements XMLHttpRequestEvents {
   _XMLHttpRequestEventsImpl(_ptr) : super(_ptr);
 
   EventListenerList get abort() => _get('abort');
@@ skipping 31 matching lines @@
   final int position;
 
   final int totalSize;
 }
 
 class _XMLHttpRequestUploadImpl extends _EventTargetImpl implements XMLHttpRequestUpload native "*XMLHttpRequestUpload" {
 
   _XMLHttpRequestUploadEventsImpl get on() =>
     new _XMLHttpRequestUploadEventsImpl(this);
 
-  void _addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
 
-  bool _dispatchEvent(_EventImpl evt) native "return this.dispatchEvent(evt);";
+  bool $dom_dispatchEvent(_EventImpl evt) native "return this.dispatchEvent(evt);";
 
-  void _removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
 }
 
 class _XMLHttpRequestUploadEventsImpl extends _EventsImpl implements XMLHttpRequestUploadEvents {
   _XMLHttpRequestUploadEventsImpl(_ptr) : super(_ptr);
 
   EventListenerList get abort() => _get('abort');
 
   EventListenerList get error() => _get('error');
 
   EventListenerList get load() => _get('load');
@@ skipping 92 matching lines @@
   String getParameter(String namespaceURI, String localName) native;
 
   void importStylesheet(_NodeImpl stylesheet) native;
 
   void removeParameter(String namespaceURI, String localName) native;
 
   void reset() native;
 
   void setParameter(String namespaceURI, String localName, String value) native;
 
-  _DocumentImpl transformToDocument(_NodeImpl source) => _FixHtmlDocumentReference(_transformToDocument(source));
-
-  _EventTargetImpl _transformToDocument(_NodeImpl source) native "return this.transformToDocument(source);";
+  _DocumentImpl transformToDocument(_NodeImpl source) native;
 
   _DocumentFragmentImpl transformToFragment(_NodeImpl source, _DocumentImpl 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.
 
 class _AudioElementFactoryProvider {
   factory AudioElement([String src = null]) native '''
       if (src == null) return new Audio();
@@ skipping 228 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.
 
 interface AbstractWorker extends EventTarget {
 
   AbstractWorkerEvents get on();
+
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture]);
+
+  bool $dom_dispatchEvent(Event evt);
+
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture]);
 }
 
 interface AbstractWorkerEvents extends Events {
 
   EventListenerList get 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.
 
@@ skipping 3490 matching lines @@
   static final int OBSOLETE = 5;
 
   static final int UNCACHED = 0;
 
   static final int UPDATEREADY = 4;
 
   final int status;
 
   void abort();
 
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture]);
+
+  bool $dom_dispatchEvent(Event evt);
+
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture]);
+
   void swapCache();
 
   void update();
 }
 
 interface DOMApplicationCacheEvents extends Events {
 
   EventListenerList get cached();
 
   EventListenerList get checking();
@@ skipping 623 matching lines @@
   final Element activeElement;
 
   Element body;
 
   String charset;
 
   String cookie;
 
   final Window window;
 
+  final Element documentElement;
+
   final String domain;
 
   final HeadElement head;
 
   final String lastModified;
 
   final String preferredStylesheetSet;
 
   final String readyState;
 
@@ skipping 18 matching lines @@
   final bool webkitIsFullScreen;
 
   final String webkitVisibilityState;
 
   Range caretRangeFromPoint(int x, int y);
 
   CDATASection createCDATASection(String data);
 
   DocumentFragment createDocumentFragment();
 
+  Element $dom_createElement(String tagName);
+
+  Element $dom_createElementNS(String namespaceURI, String qualifiedName);
+
+  Event $dom_createEvent(String eventType);
+
   Range createRange();
 
+  Text $dom_createTextNode(String data);
+
   Touch createTouch(Window window, EventTarget target, int identifier, int pageX, int pageY, int screenX, int screenY, int webkitRadiusX, int webkitRadiusY, num webkitRotationAngle, num webkitForce);
 
+  TouchList $dom_createTouchList();
+
   Element elementFromPoint(int x, int y);
 
   bool execCommand(String command, bool userInterface, String value);
 
   CanvasRenderingContext getCSSCanvasContext(String contextId, String name, int width, int height);
 
+  Element $dom_getElementById(String elementId);
+
+  NodeList $dom_getElementsByClassName(String tagname);
+
+  NodeList $dom_getElementsByName(String elementName);
+
+  NodeList $dom_getElementsByTagName(String tagname);
+
   bool queryCommandEnabled(String command);
 
   bool queryCommandIndeterm(String command);
 
   bool queryCommandState(String command);
 
   bool queryCommandSupported(String command);
 
   String queryCommandValue(String command);
 
+  Element query(String selectors);
+
+  NodeList $dom_querySelectorAll(String selectors);
+
   void webkitCancelFullScreen();
 
   void webkitExitFullscreen();
 
   WebKitNamedFlow webkitGetFlowByName(String name);
 
 }
 
 interface DocumentEvents extends ElementEvents {
 
@@ skipping 107 matching lines @@
 
   DocumentFragment.svg(String svg);
 
   DocumentFragment clone(bool deep);
 
 
   ElementEvents get on();
 
   Element query(String selectors);
 
+  NodeList $dom_querySelectorAll(String selectors);
+
 }
 // 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.
 
 interface DocumentType extends Node {
 
   final NamedNodeMap entities;
@@ skipping 41 matching lines @@
 // BSD-style license that can be found in the LICENSE file.
 
 // WARNING: Do not edit - generated code.
 
 /**
  * Provides a Map abstraction on top of data-* attributes, similar to the
  * dataSet in the old DOM.
  */
 class _DataAttributeMap implements Map<String, String> {
 
-  final Map<String, String> _attributes;
+  final Map<String, String> $dom_attributes;
 
-  _DataAttributeMap(this._attributes);
+  _DataAttributeMap(this.$dom_attributes);
 
   // interface Map
 
   // TODO: Use lazy iterator when it is available on Map.
   bool containsValue(String value) => getValues().some((v) => v == value);
 
-  bool containsKey(String key) => _attributes.containsKey(_attr(key));
+  bool containsKey(String key) => $dom_attributes.containsKey(_attr(key));
 
-  String operator [](String key) => _attributes[_attr(key)];
+  String operator [](String key) => $dom_attributes[_attr(key)];
 
   void operator []=(String key, String value) {
-    _attributes[_attr(key)] = value;
+    $dom_attributes[_attr(key)] = value;
   }
 
   String putIfAbsent(String key, String ifAbsent()) {
     if (!containsKey(key)) {
       return this[key] = ifAbsent();
     }
     return this[key];
   }
 
-  String remove(String key) => _attributes.remove(_attr(key));
+  String remove(String key) => $dom_attributes.remove(_attr(key));
 
   void clear() {
     // Needs to operate on a snapshot since we are mutatiting the collection.
     for (String key in getKeys()) {
       remove(key);
     }
   }
 
   void forEach(void f(String key, String value)) {
-    _attributes.forEach((String key, String value) {
+    $dom_attributes.forEach((String key, String value) {
       if (_matches(key)) {
         f(_strip(key), value);
       }
     });
   }
 
   Collection<String> getKeys() {
     final keys = new List<String>();
-    _attributes.forEach((String key, String value) {
+    $dom_attributes.forEach((String key, String value) {
       if (_matches(key)) {
         keys.add(_strip(key));
       }
     });
     return keys;
   }
 
   Collection<String> getValues() {
     final values = new List<String>();
-    _attributes.forEach((String key, String value) {
+    $dom_attributes.forEach((String key, String value) {
       if (_matches(key)) {
         values.add(value);
       }
     });
     return values;
   }
 
   int get length() => getKeys().length;
 
   // TODO: Use lazy iterator when it is available on Map.
@@ skipping 110 matching lines @@
     _write(s);
   }
 
   /**
    * Read the class names from the Element class property,
    * and put them into a set (duplicates are discarded).
    */
   Set<String> _read() {
     // TODO(mattsh) simplify this once split can take regex.
     Set<String> s = new Set<String>();
-    for (String name in _className().split(' ')) {
+    for (String name in $dom_className().split(' ')) {
       String trimmed = name.trim();
       if (!trimmed.isEmpty()) {
         s.add(trimmed);
       }
     }
     return s;
   }
 
   /**
    * Read the class names as a space-separated string. This is meant to be
    * overridden by subclasses.
    */
-  String _className() => _element._className;
+  String $dom_className() => _element.$dom_className;
 
   /**
    * Join all the elements of a set into one string and write
    * back to the element.
    */
   void _write(Set s) {
-    _element._className = _formatSet(s);
+    _element.$dom_className = _formatSet(s);
   }
 
   String _formatSet(Set<String> s) {
     // TODO(mattsh) should be able to pass Set to String.joins http:/b/5398605
     List list = new List.from(s);
     return Strings.join(list, ' ');
   }
 }
 
 interface ElementList extends List<Element> {
@@ skipping 66 matching lines @@
 
   Element clone(bool deep);
 
   Element get parent();
 
 
   ElementEvents get on();
 
   static final int ALLOW_KEYBOARD_INPUT = 1;
 
+  final int $dom_childElementCount;
+
+  final HTMLCollection $dom_children;
+
+  String $dom_className;
+
+  final int $dom_clientHeight;
+
+  final int $dom_clientLeft;
+
+  final int $dom_clientTop;
+
+  final int $dom_clientWidth;
+
   String contentEditable;
 
   String dir;
 
   bool draggable;
 
+  final Element $dom_firstElementChild;
+
   bool hidden;
 
   String id;
 
   String innerHTML;
 
   final bool isContentEditable;
 
   String lang;
 
-  final Element lastElementChild;
+  final Element $dom_lastElementChild;
 
   final Element nextElementSibling;
 
+  final int $dom_offsetHeight;
+
+  final int $dom_offsetLeft;
+
   final Element offsetParent;
 
+  final int $dom_offsetTop;
+
+  final int $dom_offsetWidth;
+
   final String outerHTML;
 
   final Element previousElementSibling;
 
+  final int $dom_scrollHeight;
+
+  int $dom_scrollLeft;
+
+  int $dom_scrollTop;
+
+  final int $dom_scrollWidth;
+
   bool spellcheck;
 
   final CSSStyleDeclaration style;
 
   int tabIndex;
 
   final String tagName;
 
   String title;
 
   bool translate;
 
   final String webkitRegionOverflow;
 
   String webkitdropzone;
 
   void blur();
 
   void click();
 
   void focus();
 
+  String $dom_getAttribute(String name);
+
+  ClientRect $dom_getBoundingClientRect();
+
+  ClientRectList $dom_getClientRects();
+
+  NodeList $dom_getElementsByClassName(String name);
+
+  NodeList $dom_getElementsByTagName(String name);
+
+  bool $dom_hasAttribute(String name);
+
   Element insertAdjacentElement(String where, Element element);
 
   void insertAdjacentHTML(String where, String html);
 
   void insertAdjacentText(String where, String text);
 
   Element query(String selectors);
 
+  NodeList $dom_querySelectorAll(String selectors);
+
+  void $dom_removeAttribute(String name);
+
   void scrollByLines(int lines);
 
   void scrollByPages(int pages);
 
   void scrollIntoView([bool centerIfNeeded]);
 
+  void $dom_setAttribute(String name, String value);
+
   bool matchesSelector(String selectors);
 
   void webkitRequestFullScreen(int flags);
 
   void webkitRequestFullscreen();
 
 }
 
 interface ElementEvents extends Events {
 
@@ skipping 357 matching lines @@
   bool returnValue;
 
   final EventTarget srcElement;
 
   final EventTarget target;
 
   final int timeStamp;
 
   final String type;
 
+  void $dom_initEvent(String eventTypeArg, bool canBubbleArg, bool cancelableArg);
+
   void preventDefault();
 
   void stopImmediatePropagation();
 
   void stopPropagation();
 }
 // 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.
 
@@ skipping 30 matching lines @@
   static final int CONNECTING = 0;
 
   static final int OPEN = 1;
 
   final String URL;
 
   final int readyState;
 
   final String url;
 
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture]);
+
   void close();
+
+  bool $dom_dispatchEvent(Event evt);
+
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture]);
 }
 
 interface EventSourceEvents extends Events {
 
   EventListenerList get error();
 
   EventListenerList get message();
 
   EventListenerList get open();
 }
@@ skipping 12 matching lines @@
 }
 
 interface Events {
   EventListenerList operator [](String type);
 }
 
 interface EventTarget {
 
   final Events on;
 
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture]);
+
+  bool $dom_dispatchEvent(Event event);
+
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture]);
+
 }
 // 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.
 
 interface FieldSetElement extends Element {
 
   final FormElement form;
@@ skipping 1907 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.
 
 interface MessagePort extends EventTarget {
 
   MessagePortEvents get on();
 
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture]);
+
   void close();
 
+  bool $dom_dispatchEvent(Event evt);
+
   void postMessage(String message, [List messagePorts]);
 
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture]);
+
   void start();
 
   void webkitPostMessage(String message, [List transfer]);
 }
 
 interface MessagePortEvents extends Events {
 
   EventListenerList get message();
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
@@ skipping 105 matching lines @@
 
   final int screenY;
 
   final bool shiftKey;
 
   final Node toElement;
 
   final int x;
 
   final int y;
+
+  void $dom_initMouseEvent(String type, bool canBubble, bool cancelable, Window view, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, int button, EventTarget 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.
 
 // WARNING: Do not edit - generated code.
 
 interface MutationEvent extends Event {
 
   static final int ADDITION = 2;
@@ skipping 155 matching lines @@
   static final int ENTITY_NODE = 6;
 
   static final int ENTITY_REFERENCE_NODE = 5;
 
   static final int NOTATION_NODE = 12;
 
   static final int PROCESSING_INSTRUCTION_NODE = 7;
 
   static final int TEXT_NODE = 3;
 
+  final NamedNodeMap $dom_attributes;
+
+  final NodeList $dom_childNodes;
+
+  final Node $dom_firstChild;
+
+  final Node $dom_lastChild;
+
   final Node nextNode;
 
+  final int $dom_nodeType;
+
   final Document document;
 
   final Node parent;
 
   final Node previousNode;
 
   String text;
 
+  Node $dom_appendChild(Node newChild);
+
   Node clone(bool deep);
 
   bool contains(Node other);
 
   bool hasChildNodes();
 
   Node insertBefore(Node newChild, Node refChild);
 
+  Node $dom_removeChild(Node oldChild);
+
+  Node $dom_replaceChild(Node newChild, Node oldChild);
+
 }
 // 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.
 
 interface NodeFilter {
 
   static final int FILTER_ACCEPT = 1;
@@ skipping 81 matching lines @@
 // WARNING: Do not edit - generated code.
 
 interface NodeSelector {
 
   // TODO(nweiz): add this back once DocumentFragment is ported.
   // ElementList queryAll(String selectors);
 
 
   Element query(String selectors);
 
+  NodeList $dom_querySelectorAll(String selectors);
+
 }
 // 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.
 
 interface Notation extends Node {
 
   final String publicId;
@@ skipping 1267 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.
 
 interface SVGDocument extends Document {
 
   final SVGSVGElement rootElement;
+
+  Event $dom_createEvent(String eventType);
 }
 // 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.
 
 interface SVGElement extends Element default _SVGElementFactoryProvider {
 
   SVGElement.tag(String tag);
   SVGElement.svg(String svg);
 
@@ skipping 27 matching lines @@
 
   final SVGElementInstance firstChild;
 
   final SVGElementInstance lastChild;
 
   final SVGElementInstance nextSibling;
 
   final SVGElementInstance parentNode;
 
   final SVGElementInstance previousSibling;
+
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture]);
+
+  bool $dom_dispatchEvent(Event event);
+
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture]);
 }
 
 interface SVGElementInstanceEvents extends Events {
 
   EventListenerList get abort();
 
   EventListenerList get beforeCopy();
 
   EventListenerList get beforeCut();
 
@@ skipping 1832 matching lines @@
   String replaceItem(String item, int index);
 }
 // 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.
 
 interface SVGStylable {
 
+  final SVGAnimatedString $dom_svgClassName;
+
   final CSSStyleDeclaration style;
 
   CSSValue getPresentationAttribute(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.
 
 // WARNING: Do not edit - generated code.
 
@@ skipping 2778 matching lines @@
   final int bufferedAmount;
 
   final String extensions;
 
   final String protocol;
 
   final int readyState;
 
   final String url;
 
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture]);
+
   void close([int code, String reason]);
 
+  bool $dom_dispatchEvent(Event evt);
+
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture]);
+
   bool send(String data);
 }
 
 interface WebSocketEvents extends Events {
 
   EventListenerList get close();
 
   EventListenerList get error();
 
   EventListenerList get message();
@@ skipping 157 matching lines @@
   final Window top;
 
   final IDBFactory webkitIndexedDB;
 
   final NotificationCenter webkitNotifications;
 
   final StorageInfo webkitStorageInfo;
 
   final Window window;
 
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture]);
+
   void alert(String message);
 
   String atob(String string);
 
   void blur();
 
   String btoa(String string);
 
   void captureEvents();
 
   void clearInterval(int handle);
 
   void clearTimeout(int handle);
 
   void close();
 
   bool confirm(String message);
 
+  bool $dom_dispatchEvent(Event evt);
+
   bool find(String string, bool caseSensitive, bool backwards, bool wrap, bool wholeWord, bool searchInFrames, bool showDialog);
 
   void focus();
 
+  CSSStyleDeclaration $dom_getComputedStyle(Element element, String pseudoElement);
+
   CSSRuleList getMatchedCSSRules(Element element, String pseudoElement);
 
   DOMSelection getSelection();
 
   MediaQueryList matchMedia(String query);
 
   void moveBy(num x, num y);
 
   void moveTo(num x, num y);
 
   Window open(String url, String name, [String options]);
 
   Database openDatabase(String name, String version, String displayName, int estimatedSize, [DatabaseCallback creationCallback]);
 
   void postMessage(Dynamic message, String targetOrigin, [List messagePorts]);
 
   void print();
 
   String prompt(String message, String defaultValue);
 
   void releaseEvents();
 
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture]);
+
   void resizeBy(num x, num y);
 
   void resizeTo(num width, num height);
 
   void scroll(int x, int y);
 
   void scrollBy(int x, int y);
 
   void scrollTo(int x, int y);
 
@@ skipping 336 matching lines @@
   final int status;
 
   final String statusText;
 
   final XMLHttpRequestUpload upload;
 
   bool withCredentials;
 
   void abort();
 
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture]);
+
+  bool $dom_dispatchEvent(Event evt);
+
   String getAllResponseHeaders();
 
   String getResponseHeader(String header);
 
   void open(String method, String url, [bool async, String user, String password]);
 
   void overrideMimeType(String override);
 
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture]);
+
   void send([var data]);
 
   void setRequestHeader(String header, String value);
 }
 
 interface XMLHttpRequestEvents extends Events {
 
   EventListenerList get abort();
 
   EventListenerList get error();
@@ 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.
 
 // WARNING: Do not edit - generated code.
 
 interface XMLHttpRequestUpload extends EventTarget {
 
   XMLHttpRequestUploadEvents get on();
+
+  void $dom_addEventListener(String type, EventListener listener, [bool useCapture]);
+
+  bool $dom_dispatchEvent(Event evt);
+
+  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture]);
 }
 
 interface XMLHttpRequestUploadEvents extends Events {
 
   EventListenerList get abort();
 
   EventListenerList get error();
 
   EventListenerList get load();
 
@@ skipping 913 matching lines @@
     for (TimeoutHandler handler in readyMeasurementFrameCallbacks) {
       // TODO(jacobr): wrap each call to a handler in a try-catch block.
       handler();
     }
   }
 }
 // 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.
 
-class _TextFactoryProvider {
-
-  factory Text(String data) => _document._createTextNode(data);
-}
-
 class _EventFactoryProvider {
   factory Event(String type, [bool canBubble = true,
       bool cancelable = true]) {
-    final _EventImpl e = _document._createEvent("Event");
-    e._initEvent(type, canBubble, cancelable);
+    final _EventImpl e = _document.$dom_createEvent("Event");
+    e.$dom_initEvent(type, canBubble, cancelable);
     return e;
   }
 }
 
 class _MouseEventFactoryProvider {
   factory MouseEvent(String type, Window view, int detail,
       int screenX, int screenY, int clientX, int clientY, int button,
       [bool canBubble = true, bool cancelable = true, bool ctrlKey = false,
       bool altKey = false, bool shiftKey = false, bool metaKey = false,
       EventTarget relatedTarget = null]) {
-    final e = _document._createEvent("MouseEvent");
-    e._initMouseEvent(type, canBubble, cancelable, view, detail,
+    final e = _document.$dom_createEvent("MouseEvent");
+    e.$dom_initMouseEvent(type, canBubble, cancelable, view, detail,
         screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey, metaKey,
         button, relatedTarget);
     return e;
   }
 }
 
 class _CSSStyleDeclarationFactoryProvider {
   factory CSSStyleDeclaration.css(String css) {
     final style = new Element.tag('div').style;
     style.cssText = css;
     return style;
   } 
 
   factory CSSStyleDeclaration() {
     return new CSSStyleDeclaration.css('');
   }
 }
 
-final _START_TAG_REGEXP = const RegExp('<(\\w+)');
-class _ElementFactoryProvider {
-  static final _CUSTOM_PARENT_TAG_MAP = const {
-    'body' : 'html',
-    'head' : 'html',
-    'caption' : 'table',
-    'td': 'tr',
-    'colgroup': 'table',
-    'col' : 'colgroup',
-    'tr' : 'tbody',
-    'tbody' : 'table',
-    'tfoot' : 'table',
-    'thead' : 'table',
-    'track' : 'audio',
-  };
-
-  /** @domName Document.createElement */
-  factory Element.html(String html) {
-    // TODO(jacobr): this method can be made more robust and performant.
-    // 1) Cache the dummy parent elements required to use innerHTML rather than
-    //    creating them every call.
-    // 2) Verify that the html does not contain leading or trailing text nodes.
-    // 3) Verify that the html does not contain both <head> and <body> tags.
-    // 4) Detatch the created element from its dummy parent.
-    String parentTag = 'div';
-    String tag;
-    final match = _START_TAG_REGEXP.firstMatch(html);
-    if (match !== null) {
-      tag = match.group(1).toLowerCase();
-      if (_CUSTOM_PARENT_TAG_MAP.containsKey(tag)) {
-        parentTag = _CUSTOM_PARENT_TAG_MAP[tag];
-      }
-    }
-    final _ElementImpl temp = new Element.tag(parentTag);
-    temp.innerHTML = html;
-
-    Element element;
-    if (temp.elements.length == 1) {
-      element = temp.elements.first;
-    } else if (parentTag == 'html' && temp.elements.length == 2) {
-      // Work around for edge case in WebKit and possibly other browsers where
-      // both body and head elements are created even though the inner html
-      // only contains a head or body element.
-      element = temp.elements[tag == 'head' ? 0 : 1];
-    } else {
-      throw new IllegalArgumentException('HTML had ${temp.elements.length} ' +
-          'top level elements but 1 expected');
-    }
-    element.remove();
-    return element;
-  }
-
-  /** @domName Document.createElement */
-  factory Element.tag(String tag) => _document._createElement(tag);
-}
-
 class _DocumentFragmentFactoryProvider {
   /** @domName Document.createDocumentFragment */
   factory DocumentFragment() => document.createDocumentFragment();
 
   factory DocumentFragment.html(String html) {
     final fragment = new DocumentFragment();
     fragment.innerHTML = html;
     return fragment;
   }
 
@@ skipping 17 matching lines @@
     // Copy list first since we don't want liveness during iteration.
     final List nodes = new List.from(e.nodes);
     fragment.nodes.addAll(nodes);
     return fragment;
   }
 }
 
 class _SVGElementFactoryProvider {
   factory SVGElement.tag(String tag) {
     final Element temp =
-      _document._createElementNS("http://www.w3.org/2000/svg", tag);
+      _document.$dom_createElementNS("http://www.w3.org/2000/svg", tag);
     return temp;
   }
 
   factory SVGElement.svg(String svg) {
     Element parentTag;
     final match = _START_TAG_REGEXP.firstMatch(svg);
     if (match != null && match.group(1).toLowerCase() == 'svg') {
       parentTag = new Element.tag('div');
     } else {
       parentTag = new SVGSVGElement();
@@ skipping 80 matching lines @@
 
 class _PointFactoryProvider {
 
   factory Point(num x, num y) native 'return new WebKitPoint(x, y);';
 }
 
 class _WebSocketFactoryProvider {
 
   factory WebSocket(String url) native '''return new WebSocket(url);''';
 }
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+
+class _TextFactoryProvider {
+  factory Text(String data) native "return document.createTextNode(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.
 
 // TODO(rnystrom): add a way to supress public classes from DartDoc output.
+// TODO(jacobr): we can remove this class now that we are using the $dom_
+// convention for deprecated methods rather than truly private methods.
 /**
  * This class is intended for testing purposes only.
  */
 class Testing {
   static void addEventListener(EventTarget target, String type, EventListener listener, bool useCapture) {
     final _EventTargetImpl targetImpl = target;
-    targetImpl._addEventListener(type, listener, useCapture);
+    targetImpl.$dom_addEventListener(type, listener, useCapture);
   }
   static void removeEventListener(EventTarget target, String type, EventListener listener, bool useCapture) {
     final _EventTargetImpl targetImpl = target;
-    targetImpl._removeEventListener(type, listener, useCapture);
+    targetImpl.$dom_removeEventListener(type, listener, useCapture);
   }
 
 }// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * Utils for device detection.
  */
 class _Device {
@@ skipping 103 matching lines @@
     if (length < 0) throw new IllegalArgumentException('length');
     if (start < 0) throw new IndexOutOfRangeException(start);
     int end = start + length;
     if (end > a.length) throw new IndexOutOfRangeException(end);
     for (int i = start; i < end; i++) {
       accumulator.add(a[i]);
     }
     return accumulator;
   }
 }