WIP: Propagate SurfaceID up window tree hierarchy

services/ui/ws/platform_display_init_params.h

 // Copyright 2016 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 SERVICES_UI_WS_PLATFORM_DISPLAY_INIT_PARAMS_H_
 #define SERVICES_UI_WS_PLATFORM_DISPLAY_INIT_PARAMS_H_
 
 #include <stdint.h>
 
 #include "base/memory/ref_counted.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace shell {
 class Connector;
 }
 
 namespace ui {
 
-class GpuState;
-class SurfacesState;
+namespace surfaces {
+class DisplayCompositor;
+}
 
 namespace ws {
 
 struct PlatformDisplayInitParams {
   PlatformDisplayInitParams();
   PlatformDisplayInitParams(const PlatformDisplayInitParams& other);
   ~PlatformDisplayInitParams();
 
-  scoped_refptr<SurfacesState> surfaces_state;
+  scoped_refptr<surfaces::DisplayCompositor> display_compositor;
 
   gfx::Rect display_bounds;
   int64_t display_id;
 };
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_PLATFORM_DISPLAY_INIT_PARAMS_H_