cc: Make scheduling be driven by vsync for android webview.

content/browser/android/in_process/synchronous_compositor_impl.h

Index: content/browser/android/in_process/synchronous_compositor_impl.h
diff --git a/content/browser/android/in_process/synchronous_compositor_impl.h b/content/browser/android/in_process/synchronous_compositor_impl.h
index d6cacf0dee66e8e0865d2695d988d97dc4dbd4c6..7af738d5f8ac9952898b0aad70a62afd93434fd2 100644
--- a/content/browser/android/in_process/synchronous_compositor_impl.h
+++ b/content/browser/android/in_process/synchronous_compositor_impl.h
@@ -56,7 +56,12 @@ class SynchronousCompositorImpl
   void DidDestroyRendererObjects();
 
   // Called by SynchronousCompositorExternalBeginFrameSource.
-  void NeedsBeginFramesChanged() const;
+  void OnNeedsBeginFramesChange(bool needs_begin_frames);
+
+  // Called by SynchronousCompositorOutputSurface.
+  void PostInvalidate();
+  void SendBeginFrameOnDraw();
+  void DidActivatePendingTree();
 
   // SynchronousCompositor
   bool InitializeHwDraw() override;
@@ -72,6 +77,8 @@ class SynchronousCompositorImpl
   void ReturnResources(const cc::CompositorFrameAck& frame_ack) override;
   void SetMemoryPolicy(size_t bytes_limit) override;
   void DidChangeRootLayerScrollOffset() override;
+  void SetIsActive(bool is_active) override;
+  void SendBeginFrame(cc::BeginFrameArgs args) override;
 
   // LayerScrollOffsetDelegate
   gfx::ScrollOffset GetTotalScrollOffset() override;
@@ -96,9 +103,9 @@ class SynchronousCompositorImpl
   void SetClient(SynchronousCompositorClient* compositor_client);
   void UpdateFrameMetaData(const cc::CompositorFrameMetadata& frame_info);
   void NotifyDidDestroyCompositorToClient();
-  void DidActivatePendingTree();
   void DeliverMessages();
   bool CalledOnValidThread() const;
+  void UpdateNeedsBeginFrames();
 
   SynchronousCompositorClient* compositor_client_;
   SynchronousCompositorOutputSurface* output_surface_;
@@ -107,6 +114,8 @@ class SynchronousCompositorImpl
   const int routing_id_;
   cc::InputHandler* input_handler_;
   bool invoking_composite_;
+  bool is_active_;
+  bool renderer_needs_begin_frames_;
 
   base::WeakPtrFactory<SynchronousCompositorImpl> weak_ptr_factory_;