cc: Create ProxyBeginFrameSource

cc/trees/layer_tree_host.h

Index: cc/trees/layer_tree_host.h
diff --git a/cc/trees/layer_tree_host.h b/cc/trees/layer_tree_host.h
index 68bc1ebeb3470a5ba864fac5ff9a52da59df6cbf..f9bc9723260ee9b06cc22656eea3543e020ed9c2 100644
--- a/cc/trees/layer_tree_host.h
+++ b/cc/trees/layer_tree_host.h
@@ -55,6 +55,7 @@ class LayerTreeHostImplClient;
 class LayerTreeHostSingleThreadClient;
 class PrioritizedResource;
 class PrioritizedResourceManager;
+class ProxyBeginFrameSource;
 class Region;
 class RenderingStatsInstrumentation;
 class ResourceProvider;
@@ -104,7 +105,8 @@ class CC_EXPORT LayerTreeHost {
       gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
       const LayerTreeSettings& settings,
       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
-      scoped_ptr<BeginFrameSource> external_begin_frame_source);
+      scoped_ptr<BeginFrameSource> external_begin_frame_source,
+      ProxyBeginFrameSource* proxy_begin_frame_source);
   virtual ~LayerTreeHost();
 
   void SetLayerTreeHostClientReady();
@@ -325,9 +327,6 @@ class CC_EXPORT LayerTreeHost {
   void set_surface_id_namespace(uint32_t id_namespace);
   SurfaceSequence CreateSurfaceSequence();
 
-  void SetChildrenNeedBeginFrames(bool children_need_begin_frames) const;
-  void SendBeginFramesToChildren(const BeginFrameArgs& args) const;
-
  protected:
   LayerTreeHost(LayerTreeHostClient* client,
                 SharedBitmapManager* shared_bitmap_manager,
@@ -340,7 +339,8 @@ class CC_EXPORT LayerTreeHost {
   void InitializeSingleThreaded(
       LayerTreeHostSingleThreadClient* single_thread_client,
       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
-      scoped_ptr<BeginFrameSource> external_begin_frame_source);
+      scoped_ptr<BeginFrameSource> external_begin_frame_source,
+      ProxyBeginFrameSource* proxy_begin_frame_source);
   void InitializeForTesting(scoped_ptr<Proxy> proxy_for_testing);
   void SetOutputSurfaceLostForTesting(bool is_lost) {
     output_surface_lost_ = is_lost;