Replace scoped_ptr with std::unique_ptr in //ui

ui/base/accelerators/platform_accelerator.h

 // Copyright (c) 2012 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 UI_BASE_ACCELERATORS_PLATFORM_ACCELERATOR_H_
 #define UI_BASE_ACCELERATORS_PLATFORM_ACCELERATOR_H_
 
-#include "base/memory/scoped_ptr.h"
+#include <memory>
+
 #include "ui/base/ui_base_export.h"
 
 namespace ui {
 
 // Abstract base class for platform specific accelerator keys.
 class UI_BASE_EXPORT PlatformAccelerator {
  public:
   virtual ~PlatformAccelerator() {}
 
-  virtual scoped_ptr<PlatformAccelerator> CreateCopy() const = 0;
+  virtual std::unique_ptr<PlatformAccelerator> CreateCopy() const = 0;
   virtual bool Equals(const PlatformAccelerator& rhs) const = 0;
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_ACCELERATORS_PLATFORM_ACCELERATOR_H_