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

cc/layers/surface_layer.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_LAYERS_SURFACE_LAYER_H_
 #define CC_LAYERS_SURFACE_LAYER_H_
 
 #include "base/macros.h"
 #include "cc/cc_export.h"
 #include "cc/layers/layer.h"
@@ skipping 35 matching lines @@
   }
 
  protected:
   explicit SurfaceLayer(scoped_refptr<SurfaceReferenceFactory> ref_factory);
   bool HasDrawableContent() const override;
 
  private:
   ~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_;
 
   SurfaceInfo fallback_surface_info_;
   base::Closure fallback_reference_returner_;
 
   scoped_refptr<SurfaceReferenceFactory> ref_factory_;
   bool stretch_content_to_fill_bounds_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(SurfaceLayer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_SURFACE_LAYER_H_