Remove the html warnings!

tools/dom/src/dart2js_DOMImplementation.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of html;
 
 // TODO(vsm): Unify with Dartium version.
 class _DOMWindowCrossFrame implements WindowBase {
   // Private window.  Note, this is a window in another frame, so it
   // cannot be typed as "Window" as its prototype is not patched
@@ skipping 31 matching lines @@
   _DOMWindowCrossFrame(this._window);
 
   static WindowBase _createSafe(w) {
     if (identical(w, window)) {
       return w;
     } else {
       // TODO(vsm): Cache or implement equality.
       return new _DOMWindowCrossFrame(w);
     }
   }
+
+  // TODO(efortuna): Remove this method. dartbug.com/16814

[Emily Fortuna, 2014/02/13 22:12:06]

these lines are the one thing that's different from the last version of this
commit. I've talked with Vijay, and in the interest of getting rid of warnings
for 1.2, this what we'll do for now.

+  Events get on => throw new UnimplementedError();
+  // TODO(efortuna): Remove this method. dartbug.com/16814
+  void addEventListener(String type, EventListener listener, [bool useCapture])
+      => throw new UnimplementedError();
+  // TODO(efortuna): Remove this method. dartbug.com/16814
+  bool dispatchEvent(Event event) => throw new UnimplementedError();
+  // TODO(efortuna): Remove this method. dartbug.com/16814
+  void removeEventListener(String type, EventListener listener,
+      [bool useCapture]) => throw new UnimplementedError();
 }
 
 class _LocationCrossFrame implements LocationBase {
   // Private location.  Note, this is a location object in another frame, so it
   // cannot be typed as "Location" as its prototype is not patched
   // properly.  Its fields and methods can only be accessed via JavaScript.
   var _location;
 
   void set href(String val) => _setHref(_location, val);
   static void _setHref(location, val) {
@@ skipping 30 matching lines @@
 
   static HistoryBase _createSafe(h) {
     if (identical(h, window.history)) {
       return h;
     } else {
       // TODO(vsm): Cache or implement equality.
       return new _HistoryCrossFrame(h);
     }
   }
 }