cc: Plumbing for BeginFrameSource based on Surfaces

content/browser/compositor/delegated_frame_host.h

Index: content/browser/compositor/delegated_frame_host.h
diff --git a/content/browser/compositor/delegated_frame_host.h b/content/browser/compositor/delegated_frame_host.h
index c9662cbc14482620fcf6af8aaed0ae19d9ca8fd8..64bd04f174add184d44d5ee507936ee27667763a 100644
--- a/content/browser/compositor/delegated_frame_host.h
+++ b/content/browser/compositor/delegated_frame_host.h
@@ -117,6 +117,8 @@ class CONTENT_EXPORT DelegatedFrameHost
   // cc::SurfaceFactoryClient implementation.
   void ReturnResources(const cc::ReturnedResourceArray& resources) override;
   void WillDrawSurface(cc::SurfaceId id, const gfx::Rect& damage_rect) override;
+  void SetBeginFrameSource(cc::SurfaceId surface_id,
+                           cc::BeginFrameSource* begin_frame_source) override;
 
   bool CanCopyToBitmap() const;