Reusing base::IdType<...> to implement SurfaceId.

components/mus/ws/display_manager_delegate.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 COMPONENTS_MUS_WS_DISPLAY_MANAGER_DELEGATE_H_
 #define COMPONENTS_MUS_WS_DISPLAY_MANAGER_DELEGATE_H_
 
+#include "cc/surfaces/surface_id.h"
 #include "components/mus/public/interfaces/window_tree.mojom.h"
 #include "components/mus/ws/ids.h"
 
-namespace cc {
-struct SurfaceId;
-}
-
 namespace mus {
 
 namespace ws {
 
 class ServerWindow;
 
 // A DisplayManagerDelegate an interface to be implemented by an object that
 // manages the lifetime of a DisplayManager, forwards events to the appropriate
 // windows, and responses to changes in viewport size.
 class DisplayManagerDelegate {
@@ skipping 19 matching lines @@
 
  protected:
   virtual ~DisplayManagerDelegate() {}
 };
 
 }  // namespace ws
 
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_WS_DISPLAY_MANAGER_DELEGATE_H_