Let EventTarget be a base class in the frog dom.

client/dom/frog/dom_frog.dart

 #library('dom');
 
 // 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.
 
 // DO NOT EDIT
 // Auto-generated Dart DOM library.
 
 
 
 
 // TODO(sra): What 'window' do we get in a worker?  Perhaps this
 // should return the interface type.
 DOMWindow get window() native "return window;";
 
 // TODO(vsm): Revert to Dart method when 508 is fixed.
 HTMLDocument get document() native "return window.document;";
 
-class _AbstractWorkerJs extends _DOMTypeJs implements AbstractWorker native "*AbstractWorker" {
+class _AbstractWorkerJs extends _EventTargetJs implements AbstractWorker native "*AbstractWorker" {
 
   void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
 
   bool dispatchEvent(_EventJs evt) native;
 
   void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
 }
 
 class _ArrayBufferJs extends _DOMTypeJs implements ArrayBuffer native "*ArrayBuffer" {
 
@@ skipping 884 matching lines @@
   void getRandomValues(_ArrayBufferViewJs array) native;
 }
 
 class _CustomEventJs extends _EventJs implements CustomEvent native "*CustomEvent" {
 
   final Object detail;
 
   void initCustomEvent(String typeArg, bool canBubbleArg, bool cancelableArg, Object detailArg) native;
 }
 
-class _DOMApplicationCacheJs extends _DOMTypeJs implements DOMApplicationCache native "*DOMApplicationCache" {
+class _DOMApplicationCacheJs extends _EventTargetJs implements DOMApplicationCache native "*DOMApplicationCache" {
 
   static final int CHECKING = 2;
 
   static final int DOWNLOADING = 3;
 
   static final int IDLE = 1;
 
   static final int OBSOLETE = 5;
 
   static final int UNCACHED = 0;
@@ skipping 236 matching lines @@
   bool toggle(String token) native;
 }
 
 class _DOMURLJs extends _DOMTypeJs implements DOMURL native "*DOMURL" {
 
   String createObjectURL(_BlobJs blob) native;
 
   void revokeObjectURL(String url) native;
 }
 
-class _DOMWindowJs extends _DOMTypeJs implements DOMWindow native "@*DOMWindow" {
+class _DOMWindowJs extends _EventTargetJs implements DOMWindow native "@*DOMWindow" {
 
   static final int PERSISTENT = 1;
 
   static final int TEMPORARY = 0;
 
   final _DOMApplicationCacheJs applicationCache;
 
   _NavigatorJs clientInformation;
 
   final bool closed;
@@ skipping 799 matching lines @@
 
   final int code;
 
   final String message;
 
   final String name;
 
   String toString() native;
 }
 
-class _EventSourceJs extends _DOMTypeJs implements EventSource native "*EventSource" {
+class _EventSourceJs extends _EventTargetJs implements EventSource native "*EventSource" {
 
   static final int CLOSED = 2;
 
   static final int CONNECTING = 0;
 
   static final int OPEN = 1;
 
   final String URL;
 
   final int readyState;
@@ skipping 2772 matching lines @@
 
   final List ports;
 
   final _DOMWindowJs source;
 
   void initMessageEvent(String typeArg, bool canBubbleArg, bool cancelableArg, Object dataArg, String originArg, String lastEventIdArg, _DOMWindowJs sourceArg, List messagePorts) native;
 
   void webkitInitMessageEvent(String typeArg, bool canBubbleArg, bool cancelableArg, Object dataArg, String originArg, String lastEventIdArg, _DOMWindowJs sourceArg, List transferables) native;
 }
 
-class _MessagePortJs extends _DOMTypeJs implements MessagePort native "*MessagePort" {
+class _MessagePortJs extends _EventTargetJs implements MessagePort native "*MessagePort" {
 
   void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
 
   void close() native;
 
   bool dispatchEvent(_EventJs evt) native;
 
   void postMessage(String message, [List messagePorts = null]) native;
 
   void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
@@ skipping 192 matching lines @@
 
   final String vendorSub;
 
   void getStorageUpdates() native;
 
   bool javaEnabled() native;
 
   void registerProtocolHandler(String scheme, String url, String title) native;
 }
 
-class _NodeJs extends _DOMTypeJs implements Node native "*Node" {
+class _NodeJs extends _EventTargetJs implements Node native "*Node" {
 
   static final int ATTRIBUTE_NODE = 2;
 
   static final int CDATA_SECTION_NODE = 4;
 
   static final int COMMENT_NODE = 8;
 
   static final int DOCUMENT_FRAGMENT_NODE = 11;
 
   static final int DOCUMENT_NODE = 9;
@@ skipping 242 matching lines @@
   _NodeListJs querySelectorAll(String selectors) native;
 }
 
 class _NotationJs extends _NodeJs implements Notation native "*Notation" {
 
   final String publicId;
 
   final String systemId;
 }
 
-class _NotificationJs extends _DOMTypeJs implements Notification native "*Notification" {
+class _NotificationJs extends _EventTargetJs implements Notification native "*Notification" {
 
   String dir;
 
   String replaceId;
 
   void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
 
   void cancel() native;
 
   bool dispatchEvent(_EventJs evt) native;
@@ skipping 867 matching lines @@
 
   String id;
 
   final _SVGSVGElementJs ownerSVGElement;
 
   final _SVGElementJs viewportElement;
 
   String xmlbase;
 }
 
-class _SVGElementInstanceJs extends _DOMTypeJs implements SVGElementInstance native "*SVGElementInstance" {
+class _SVGElementInstanceJs extends _EventTargetJs implements SVGElementInstance native "*SVGElementInstance" {
 
   final _SVGElementInstanceListJs childNodes;
 
   final _SVGElementJs correspondingElement;
 
   final _SVGUseElementJs correspondingUseElement;
 
   final _SVGElementInstanceJs firstChild;
 
   final _SVGElementInstanceJs lastChild;
@@ skipping 4775 matching lines @@
   num y;
 }
 
 class _WebKitTransitionEventJs extends _EventJs implements WebKitTransitionEvent native "*WebKitTransitionEvent" {
 
   final num elapsedTime;
 
   final String propertyName;
 }
 
-class _WebSocketJs extends _DOMTypeJs implements WebSocket native "*WebSocket" {
+class _WebSocketJs extends _EventTargetJs implements WebSocket native "*WebSocket" {
 
   static final int CLOSED = 3;
 
   static final int CLOSING = 2;
 
   static final int CONNECTING = 0;
 
   static final int OPEN = 1;
 
   final String URL;
@@ skipping 145 matching lines @@
 
   final String appVersion;
 
   final bool onLine;
 
   final String platform;
 
   final String userAgent;
 }
 
-class _XMLHttpRequestJs extends _DOMTypeJs implements XMLHttpRequest native "*XMLHttpRequest" {
+class _XMLHttpRequestJs extends _EventTargetJs implements XMLHttpRequest native "*XMLHttpRequest" {
 
   static final int DONE = 4;
 
   static final int HEADERS_RECEIVED = 2;
 
   static final int LOADING = 3;
 
   static final int OPENED = 1;
 
   static final int UNSENT = 0;
@@ skipping 56 matching lines @@
   String toString() native;
 }
 
 class _XMLHttpRequestProgressEventJs extends _ProgressEventJs implements XMLHttpRequestProgressEvent native "*XMLHttpRequestProgressEvent" {
 
   final int position;
 
   final int totalSize;
 }
 
-class _XMLHttpRequestUploadJs extends _DOMTypeJs implements XMLHttpRequestUpload native "*XMLHttpRequestUpload" {
+class _XMLHttpRequestUploadJs extends _EventTargetJs implements XMLHttpRequestUpload native "*XMLHttpRequestUpload" {
 
   void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
 
   bool dispatchEvent(_EventJs evt) native;
 
   void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
 }
 
 class _XMLSerializerJs extends _DOMTypeJs implements XMLSerializer native "*XMLSerializer" {
 
@@ skipping 12287 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;
   }
 }