WIP: Propagate SurfaceID up window tree hierarchy

ash/mus/non_client_frame_controller.h

 // Copyright 2015 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 ASH_MUS_NON_CLIENT_FRAME_CONTROLLER_H_
 #define ASH_MUS_NON_CLIENT_FRAME_CONTROLLER_H_
 
 #include <stdint.h>
 
 #include "ash/mus/frame/detached_title_area_renderer_host.h"
@@ skipping 56 matching lines @@
   void OnTreeChanged(const TreeChangeParams& params) override;
   void OnWindowSharedPropertyChanged(
       ui::Window* window,
       const std::string& name,
       const std::vector<uint8_t>* old_data,
       const std::vector<uint8_t>* new_data) override;
   void OnWindowLocalPropertyChanged(ui::Window* window,
                                     const void* key,
                                     intptr_t old) override;
   void OnWindowDestroyed(ui::Window* window) override;
+  void OnChildWindowSurfaceCreated(
+      ui::Window* window,
+      const gfx::Size& size,
+      float device_scale_factor,
+      const cc::SurfaceId& surface_id,
+      const cc::SurfaceSequence& surface_sequence) override;
 
   views::Widget* widget_;
 
   // WARNING: as widget delays destruction there is a portion of time when this
   // is null.
   ui::Window* window_;
 
   // Used if a child window is added that has the
   // kRendererParentTitleArea_Property set.
   DetachedTitleAreaRenderer* detached_title_area_renderer_ = nullptr;
 
   DISALLOW_COPY_AND_ASSIGN(NonClientFrameController);
 };
 
 }  // namespace mus
 }  // namespace ash
 
 #endif  // ASH_MUS_NON_CLIENT_FRAME_CONTROLLER_H_