"Reverting 12887"

lib/html/templates/html/dartium/impl_Window.darttemplate

Index: lib/html/templates/html/dartium/impl_Window.darttemplate
diff --git a/lib/html/templates/html/dartium/impl_Window.darttemplate b/lib/html/templates/html/dartium/impl_Window.darttemplate
index ac6f2d15d45450a26acdfe3683a7629910f49c9c..fab97f7b8682737a37daebcb1489011c502990ce 100644
--- a/lib/html/templates/html/dartium/impl_Window.darttemplate
+++ b/lib/html/templates/html/dartium/impl_Window.darttemplate
@@ -8,6 +8,11 @@ class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
     _addMeasurementFrameCallback(callback);
   }
 
+  int requestAnimationFrame(RequestAnimationFrameCallback callback) =>
+      webkitRequestAnimationFrame(callback);
+
+  void cancelAnimationFrame(int id) => webkitCancelAnimationFrame(id);
+
   // TODO(kasperl): Document these.
   lookupPort(String name) {
     var port = JSON.parse(localStorage['dart-port:$name']);