Chromium support for window.webkitRequestAnimationFrame()

This is a very simple scheduler that targets 100fps.

BUG=64848
TEST=layout tests

Review URL: http://codereview.chromium.org/6136005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@71909 0039d316-1c4b-4281-b951-d872f2087c98

chrome/renderer/render_widget_fullscreen_pepper.cc

@@ -56,6 +56,9 @@ class PepperWidget : public WebWidget {
     widget_->Invalidate();
   }
 
+  virtual void animate() {
+  }
+
   virtual void layout() {
   }