cc: Plumbing for BeginFrameSource based on Surfaces

cc/surfaces/surface_display_output_surface.cc

Index: cc/surfaces/surface_display_output_surface.cc
diff --git a/cc/surfaces/surface_display_output_surface.cc b/cc/surfaces/surface_display_output_surface.cc
index ed26b491bf080292975ed4a8d0161bcc1995cd40..beba0dd9d81129fd51bfc34a1d804d7476e664e9 100644
--- a/cc/surfaces/surface_display_output_surface.cc
+++ b/cc/surfaces/surface_display_output_surface.cc
@@ -93,6 +93,12 @@ void SurfaceDisplayOutputSurface::ReturnResources(
     client_->ReclaimResources(&ack);
 }
 
+void SurfaceDisplayOutputSurface::SetBeginFrameSource(
+    BeginFrameSource* begin_frame_source) {
+  // TODO(tansell): Hook this up to RWHV and use an orphan BeginFrameSource if
+  // null.
+}
+
 void SurfaceDisplayOutputSurface::SwapBuffersComplete(SurfaceDrawStatus drawn) {
   if (client_ && !display_client_->output_surface_lost())
     client_->DidSwapBuffersComplete();