Convert //ash from scoped_ptr to std::unique_ptr

ash/frame/caption_buttons/frame_size_button.h

 // Copyright 2014 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_FRAME_CAPTION_BUTTONS_FRAME_SIZE_BUTTON_H_
 #define ASH_FRAME_CAPTION_BUTTONS_FRAME_SIZE_BUTTON_H_
 
+#include <memory>
+
 #include "ash/ash_export.h"
 #include "ash/frame/caption_buttons/frame_caption_button.h"
 #include "ash/frame/caption_buttons/frame_size_button_delegate.h"
 #include "base/macros.h"
 #include "base/timer/timer.h"
 
 namespace views {
 class Widget;
 }
 
@@ skipping 87 matching lines @@
   bool in_snap_mode_;
 
   // The action to execute when the drag/click is ended. If
   // |snap_type_| == SNAP_NONE, the size button's default action is run when the
   // drag/click is ended.
   SnapType snap_type_;
 
   // Displays a preview of how the window's bounds will change as a result of
   // snapping the window left or right. The preview is only visible if the snap
   // left or snap right button is pressed.
-  scoped_ptr<PhantomWindowController> phantom_window_controller_;
+  std::unique_ptr<PhantomWindowController> phantom_window_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameSizeButton);
 };
 
 }  // namespace ash
 
 #endif  // ASH_FRAME_CAPTION_BUTTONS_FRAME_SIZE_BUTTON_H_