cc: Plumbing for BeginFrameSource based on Surfaces

cc/surfaces/surface_display_output_surface.h

Index: cc/surfaces/surface_display_output_surface.h
diff --git a/cc/surfaces/surface_display_output_surface.h b/cc/surfaces/surface_display_output_surface.h
index 2cdaadc78307c40b5d107b17e55915e9c38ce01f..5dbbbe00d099db9c68c755160bc5fce28966eb8d 100644
--- a/cc/surfaces/surface_display_output_surface.h
+++ b/cc/surfaces/surface_display_output_surface.h
@@ -45,6 +45,8 @@ class CC_SURFACES_EXPORT SurfaceDisplayOutputSurface
 
   // SurfaceFactoryClient implementation.
   void ReturnResources(const ReturnedResourceArray& resources) override;
+  void SetBeginFrameSource(SurfaceId surface_id,
+                           BeginFrameSource* begin_frame_source) override;
 
  private:
   void SwapBuffersComplete(SurfaceDrawStatus drawn);