convert //mash to std::unique_ptr

mash/wm/frame/move_event_handler.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 MASH_WM_FRAME_MOVE_EVENT_HANDLER_H_
 #define MASH_WM_FRAME_MOVE_EVENT_HANDLER_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "ui/aura/window_observer.h"
 #include "ui/events/event_handler.h"
 
 namespace aura {
 class Window;
 }
 
 namespace mus {
 class Window;
 }
@@ skipping 24 matching lines @@
   void OnMouseEvent(ui::MouseEvent* event) override;
   void OnTouchEvent(ui::TouchEvent* event) override;
   void OnCancelMode(ui::CancelModeEvent* event) override;
 
   // Overridden from aura::WindowObserver:
   void OnWindowDestroying(aura::Window* window) override;
 
   mus::Window* mus_window_;
   aura::Window* aura_window_;
   aura::Window* root_window_;
-  scoped_ptr<MoveLoop> move_loop_;
+  std::unique_ptr<MoveLoop> move_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(MoveEventHandler);
 };
 
 }  // namespace wm
 }  // namespace mash
 
 #endif  // MASH_WM_FRAME_MOVE_EVENT_HANDLER_H_