Fix animationFrameRequest for dartium.

sdk/lib/html/dart2js/html_dart2js.dart

Index: sdk/lib/html/dart2js/html_dart2js.dart
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index e5eae907f8f803b2799ca75fcc883bc2bf0276a1..c9cd5cbe30e2e2458a62a5dd9cb26dbbd261777c 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -34880,6 +34880,7 @@ class Window extends EventTarget implements WindowEventHandlers, WindowBase, Glo
     JS('void', '#.location = #', this, value);
   }
 
+
   /**
    * Called to draw an animation frame and then request the window to repaint
    * after [callback] has finished (creating the animation).
@@ -34933,6 +34934,7 @@ class Window extends EventTarget implements WindowEventHandlers, WindowBase, Glo
    * * [Window.cancelAnimationFrame](https://developer.mozilla.org/en-US/docs/Web/API/Window.cancelAnimationFrame)
    *   from MDN.
    */
+  @DomName('Window.cancelAnimationFrame')
   void cancelAnimationFrame(int id) {
     _ensureRequestAnimationFrame();
     var task = AnimationFrameTask._tasks.remove(id);
@@ -34995,7 +34997,6 @@ class Window extends EventTarget implements WindowEventHandlers, WindowBase, Glo
   @DomName('Window.console')
   Console get console => Console._safeConsole;
 
-
   /**
    * Access a sandboxed file system of the specified `size`. If `persistent` is
    * true, the application will request permission from the user to create