Minimal fix to get cross frame tests working, take #2.

lib/html/dartium/html_dartium.dart

Index: lib/html/dartium/html_dartium.dart
diff --git a/lib/html/dartium/html_dartium.dart b/lib/html/dartium/html_dartium.dart
index 1b8c4e42c662de3faa405572a80817205e77c1e7..a076440898267d122a5b209f4978ce28feac7b2d 100644
--- a/lib/html/dartium/html_dartium.dart
+++ b/lib/html/dartium/html_dartium.dart
@@ -10731,18 +10731,20 @@ class _IDBVersionChangeRequestEventsImpl extends _IDBRequestEventsImpl implement
 
   EventListenerList get blocked() => _get('blocked');
 }
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for 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 _IFrameElementImpl extends _ElementImpl implements IFrameElement {
+
+  Window get contentWindow() => _wrap(_ptr.contentWindow);
+
   _IFrameElementImpl._wrap(ptr) : super._wrap(ptr);
 
   String get align() => _wrap(_ptr.align);
 
   void set align(String value) { _ptr.align = _unwrap(value); }
 
-  Document get contentDocument() => _wrap(_ptr.contentDocument);
-
-  Window get contentWindow() => _wrap(_ptr.contentWindow);
-
   String get frameBorder() => _wrap(_ptr.frameBorder);
 
   void set frameBorder(String value) { _ptr.frameBorder = _unwrap(value); }
@@ -10790,6 +10792,7 @@ class _IFrameElementImpl extends _ElementImpl implements IFrameElement {
   SVGDocument getSVGDocument() {
     return _wrap(_ptr.getSVGDocument());
   }
+
 }
 
 class _IceCandidateImpl extends _DOMTypeBase implements IceCandidate {
@@ -21493,6 +21496,8 @@ class _WindowImpl extends _EventTargetImpl implements Window {
   int requestAnimationFrame(RequestAnimationFrameCallback callback) =>
       webkitRequestAnimationFrame(callback);
 
+  Window get top() => _wrap(_ptr.top);
+
   _WindowImpl._wrap(ptr) : super._wrap(ptr);
 
   _WindowEventsImpl get on() {
@@ -21522,8 +21527,6 @@ class _WindowImpl extends _EventTargetImpl implements Window {
 
   Event get event() => _wrap(_ptr.event);
 
-  Element get frameElement() => _wrap(_ptr.frameElement);
-
   Window get frames() => _wrap(_ptr.frames);
 
   History get history() => _wrap(_ptr.history);
@@ -21598,8 +21601,6 @@ class _WindowImpl extends _EventTargetImpl implements Window {
 
   BarInfo get toolbar() => _wrap(_ptr.toolbar);
 
-  Window get top() => _wrap(_ptr.top);
-
   IDBFactory get webkitIndexedDB() => _wrap(_ptr.webkitIndexedDB);
 
   NotificationCenter get webkitNotifications() => _wrap(_ptr.webkitNotifications);
@@ -30170,12 +30171,6 @@ interface IFrameElement extends Element {
   /** @domName HTMLIFrameElement.align */
   String align;
 
-  /** @domName HTMLIFrameElement.contentDocument */
-  final Document contentDocument;
-
-  /** @domName HTMLIFrameElement.contentWindow */
-  final Window contentWindow;
-
   /** @domName HTMLIFrameElement.frameBorder */
   String frameBorder;
 
@@ -40016,9 +40011,6 @@ interface Window extends EventTarget {
   /** @domName DOMWindow.event */
   final Event event;
 
-  /** @domName DOMWindow.frameElement */
-  final Element frameElement;
-
   /** @domName DOMWindow.frames */
   final Window frames;
 
@@ -40121,9 +40113,6 @@ interface Window extends EventTarget {
   /** @domName DOMWindow.toolbar */
   final BarInfo toolbar;
 
-  /** @domName DOMWindow.top */
-  final Window top;
-
   /** @domName DOMWindow.webkitIndexedDB */
   final IDBFactory webkitIndexedDB;