convert //gpu to std::unique_ptr

gpu/ipc/service/image_transport_surface_overlay_mac.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 GPU_IPC_SERVICE_IMAGE_TRANSPORT_SURFACE_OVERLAY_MAC_H_
 #define GPU_IPC_SERVICE_IMAGE_TRANSPORT_SURFACE_OVERLAY_MAC_H_
 
 #include <list>
+#include <memory>
 #include <vector>
 
 #import "base/mac/scoped_nsobject.h"
 #include "base/timer/timer.h"
 #include "gpu/ipc/service/gpu_command_buffer_stub.h"
 #include "gpu/ipc/service/image_transport_surface.h"
 #include "ui/base/cocoa/remote_layer_api.h"
 #include "ui/gl/gl_surface.h"
 #include "ui/gl/gpu_switching_observer.h"
 #include "ui/latency_info/latency_info.h"
@@ skipping 73 matching lines @@
 
   gfx::Size pixel_size_;
   float scale_factor_;
 
   // The renderer ID that all contexts made current to this surface should be
   // targeting.
   GLint gl_renderer_id_;
 
   // Planes that have been scheduled, but have not had a subsequent SwapBuffers
   // call made yet.
-  scoped_ptr<CALayerPartialDamageTree> pending_partial_damage_tree_;
-  scoped_ptr<CALayerTree> pending_ca_layer_tree_;
+  std::unique_ptr<CALayerPartialDamageTree> pending_partial_damage_tree_;
+  std::unique_ptr<CALayerTree> pending_ca_layer_tree_;
 
   // The planes that are currently being displayed on the screen.
-  scoped_ptr<CALayerPartialDamageTree> current_partial_damage_tree_;
-  scoped_ptr<CALayerTree> current_ca_layer_tree_;
+  std::unique_ptr<CALayerPartialDamageTree> current_partial_damage_tree_;
+  std::unique_ptr<CALayerTree> current_ca_layer_tree_;
 
   // The vsync information provided by the browser.
   bool vsync_parameters_valid_;
   base::TimeTicks vsync_timebase_;
   base::TimeDelta vsync_interval_;
 };
 
 }  // namespace gpu
 
 #endif  // GPU_IPC_SERVICE_IMAGE_TRANSPORT_SURFACE_OVERLAY_MAC_H_