Remove RequestAnimationFrame from mojo, add delayed tasks to RunLoop

mojo/examples/sample_app/gles2_client_impl.h

Index: mojo/examples/sample_app/gles2_client_impl.h
diff --git a/mojo/examples/sample_app/gles2_client_impl.h b/mojo/examples/sample_app/gles2_client_impl.h
index dbccbfb17c3427d9b3ebfae83b8d0c9a0313b231..1a968a00f163b609f58f5f1671db8aaa8793e180 100644
--- a/mojo/examples/sample_app/gles2_client_impl.h
+++ b/mojo/examples/sample_app/gles2_client_impl.h
@@ -19,15 +19,12 @@ class GLES2ClientImpl {
 
   void SetSize(const mojo::Size& size);
   void HandleInputEvent(const mojo::Event& event);
+  void Draw();
 
  private:
   void ContextLost();
   static void ContextLostThunk(void* closure);
-  void DrawAnimationFrame();
-  static void DrawAnimationFrameThunk(void* closure);
-
-  void RequestAnimationFrames();
-  void CancelAnimationFrames();
+  void WantToDraw();
 
   MojoTimeTicks last_time_;
   mojo::Size size_;
@@ -35,7 +32,7 @@ class GLES2ClientImpl {
   mojo::Point capture_point_;
   mojo::Point last_drag_point_;
   MojoTimeTicks drag_start_time_;
-  bool getting_animation_frames_;
+  bool waiting_to_draw_;
 
   MojoGLES2Context context_;