Implement measurement using futures

client/html/src/Window.dart

 // 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.
 
 interface WindowEvents extends Events {
   EventListenerList get abort();
   EventListenerList get beforeUnload();
   EventListenerList get blur();
   EventListenerList get canPlay();
   EventListenerList get canPlayThrough();
@@ skipping 245 matching lines @@
   void close();
 
   bool confirm([String message]);
 
   FileReader createFileReader();
 
   bool find([String string, bool caseSensitive, bool backwards, bool wrap, bool wholeWord, bool searchInFrames, bool showDialog]);
 
   void focus();
 
-  CSSStyleDeclaration getComputedStyle([Element element, String pseudoElement]);
-
   DOMSelection getSelection();
 
   MediaQueryList matchMedia(String query);
 
   void moveBy(num x, num y);
 
   void moveTo(num x, num y);
 
   Window open(String url, String target, [String features]);
 
@@ skipping 10 matching lines @@
   void resizeTo(num width, num height);
 
   void scroll(int x, int y);
 
   void scrollBy(int x, int y);
 
   void scrollTo(int x, int y);
 
   int setInterval(TimeoutHandler handler, int timeout);
 
-  int setTimeout([TimeoutHandler handler, int timeout]);
+  int setTimeout(TimeoutHandler handler, int timeout);
 
   Object showModalDialog(String url, [Object dialogArgs, String featureArgs]);
 
   void stop();
 
   void webkitCancelRequestAnimationFrame(int id);
 
+  // TODO(jacobr): make these return Future<Point>.
   Point webkitConvertPointFromNodeToPage([Node node, Point p]);
 
   Point webkitConvertPointFromPageToNode([Node node, Point p]);
 
   int webkitRequestAnimationFrame(RequestAnimationFrameCallback callback, [Element element]);
 
+  /**
+   * Executes a [callback] after the next batch of browser layout measurements
+   * has completed or would have completed if any browser layout measurements
+   * had been scheduled.
+   */
+  void requestLayoutFrame(TimeoutHandler callback);
+
   // Window open(String url, String target, WindowSpec features);
 
   WindowEvents get on();
 }