convert //gpu to std::unique_ptr

gpu/ipc/service/ca_layer_tree_mac.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 GPU_IPC_SERVICE_CA_LAYER_TREE_MAC_H_
 #define GPU_IPC_SERVICE_CA_LAYER_TREE_MAC_H_
 
 #include <IOSurface/IOSurface.h>
 #include <QuartzCore/QuartzCore.h>
+
 #include <deque>
+#include <memory>
 #include <vector>
 
 #include "base/mac/scoped_cftyperef.h"
 #include "base/mac/scoped_nsobject.h"
-#include "base/memory/scoped_ptr.h"
 #include "gpu/gpu_export.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/rect_f.h"
 #include "ui/gfx/mac/io_surface.h"
 #include "ui/gfx/transform.h"
 
 @class AVSampleBufferDisplayLayer;
 
 namespace gpu {
 
@@ skipping 20 matching lines @@
                        unsigned background_color,
                        unsigned edge_aa_mask,
                        float opacity);
 
   // Create a CALayer tree for the scheduled layers, and set |superlayer| to
   // have only this tree as its sublayers. If |old_tree| is non-null, then try
   // to re-use the CALayers of |old_tree| as much as possible. |old_tree| will
   // be destroyed at the end of the function, and any CALayers in it which were
   // not re-used by |this| will be removed from the CALayer hierarchy.
   void CommitScheduledCALayers(CALayer* superlayer,
-                               scoped_ptr<CALayerTree> old_tree,
+                               std::unique_ptr<CALayerTree> old_tree,
                                float scale_factor);
 
  private:
   struct RootLayer;
   struct ClipAndSortingLayer;
   struct TransformLayer;
   struct ContentLayer;
 
   struct RootLayer {
     RootLayer();
@@ skipping 126 matching lines @@
   float scale_factor_ = 1;
   bool has_committed_ = false;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CALayerTree);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_IPC_SERVICE_CA_LAYER_TREE_MAC_H_