Remove the html warnings!

tools/dom/src/dart2js_DOMImplementation.dart

Index: tools/dom/src/dart2js_DOMImplementation.dart
diff --git a/tools/dom/src/dart2js_DOMImplementation.dart b/tools/dom/src/dart2js_DOMImplementation.dart
index 051df51c2451dac4b19e247983439a058fb691ae..78a54b3fca6b048f0a38fc16e68555fc342fa307 100644
--- a/tools/dom/src/dart2js_DOMImplementation.dart
+++ b/tools/dom/src/dart2js_DOMImplementation.dart
@@ -49,6 +49,17 @@ class _DOMWindowCrossFrame implements WindowBase {
       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 {