Enable cross frame window operations

lib/html/src/frog_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.
 
 // TODO(vsm): Unify with Dartium version.
 class _DOMWindowCrossFrameImpl implements Window {
   // Private window.
   _WindowImpl _window;
 
   // Fields.
   // TODO(vsm): Implement history and location getters.
 
-  bool get closed() => _window.closed;
-  int get length() => _window.length;
-  Window get opener() => _createSafe(_window.opener);
-  Window get parent() => _createSafe(_window.parent);
-  Window get top() => _createSafe(_window.top);
+  bool get closed() => _closed(_window);
+  static bool _closed(win) native "return win.closed;";
+
+  bool get length() => _length(_window);

[sra1, 2012/06/21 16:18:01]

Since there is no indexer, there is no point to length.
We should probably have a ChildWindowList or something.

+  static bool _length(win) native "return win.length;";
+
+  Window get opener() => _createSafe(_opener(_window));
+  static Window _opener(win) native "return win.opener;";
+
+  Window get parent() => _createSafe(_parent(_window));
+  static Window _parent(win) native "return win.parent;";
+
+  Window get top() => _createSafe(_top(_window));
+  static Window _top(win) native "return win.top;";
 
   // Methods.
-  void focus() => _window.focus();
+  void focus() => _focus(_window);
+  static void _focus(win) native "win.focus()";
 
-  void blur() => _window.blur();
+  void blur() => _blur(_window);
+  static void _blur(win) native "win.blur()";
 
-  void close() => _window.close();
+  void close() => _close(_window);
+  static void _close(win) native "win.close()";
 
   void postMessage(Dynamic message,
                    String targetOrigin,
                    [List messagePorts = null]) {
     if (messagePorts == null) {
       _postMessage2(_window, message, targetOrigin);
     } else {
       _postMessage3(_window, message, targetOrigin, messagePorts);
     }
   }
@@ skipping 14 matching lines @@
 
   static Window _createSafe(w) {
     if (w === window) {
       return w;
     } else {
       // TODO(vsm): Cache or implement equality.
       return new _DOMWindowCrossFrameImpl(w);
     }
   }
 }