cc : Store surface layer ids on LayerTreeHost and push them at commit

cc/layers/surface_layer.h

Index: cc/layers/surface_layer.h
diff --git a/cc/layers/surface_layer.h b/cc/layers/surface_layer.h
index 56f8d61f87947f4c316785d3a84827f454b939d7..c946a35f3464457bb8aaf1988dae38ec0170a038 100644
--- a/cc/layers/surface_layer.h
+++ b/cc/layers/surface_layer.h
@@ -53,6 +53,8 @@ class CC_EXPORT SurfaceLayer : public Layer {
   ~SurfaceLayer() override;
   void RemoveReference(base::Closure reference_returner);
 
+  const SurfaceId* GetSurfaceId(LayerTreeHost* new_host = nullptr);

[Fady Samuel, 2017/05/24 01:12:52]

nit: GetReferencedSurfaceId

[jaydasika, 2017/05/24 18:13:30]

Done.

+
   SurfaceInfo primary_surface_info_;
   base::Closure primary_reference_returner_;