cc: Plumbing for BeginFrameSource based on Surfaces

cc/surfaces/surface_factory.cc

Index: cc/surfaces/surface_factory.cc
diff --git a/cc/surfaces/surface_factory.cc b/cc/surfaces/surface_factory.cc
index 72ebdc40d98312e272a1fe63283c6292a354254d..b71994e987ae19786bb6dfa4d73ca1013f595beb 100644
--- a/cc/surfaces/surface_factory.cc
+++ b/cc/surfaces/surface_factory.cc
@@ -27,6 +27,7 @@ SurfaceFactory::~SurfaceFactory() {
                << " entries in map on destruction.";
   }
   DestroyAll();
+  client_->SetBeginFrameSource(SurfaceId(), nullptr);
 }
 
 void SurfaceFactory::DestroyAll() {
@@ -49,6 +50,11 @@ void SurfaceFactory::Destroy(SurfaceId surface_id) {
   manager_->Destroy(surface_map_.take_and_erase(it));
 }
 
+void SurfaceFactory::SetBeginFrameSource(SurfaceId surface_id,
+                                         BeginFrameSource* begin_frame_source) {
+  client_->SetBeginFrameSource(surface_id, begin_frame_source);
+}
+
 void SurfaceFactory::SubmitCompositorFrame(SurfaceId surface_id,
                                            scoped_ptr<CompositorFrame> frame,
                                            const DrawCallback& callback) {