Replace scoped_ptr with std::unique_ptr in //ui

ui/base/idle/idle_query_x11.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_IDLE_IDLE_QUERY_X11_H_
 #define UI_BASE_IDLE_IDLE_QUERY_X11_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 
 namespace ui {
 
 class IdleData;
 
 class IdleQueryX11 {
  public:
   IdleQueryX11();
   ~IdleQueryX11();
 
   int IdleTime();
 
  private:
-  scoped_ptr<IdleData> idle_data_;
+  std::unique_ptr<IdleData> idle_data_;
 
   DISALLOW_COPY_AND_ASSIGN(IdleQueryX11);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_IDLE_IDLE_QUERY_X11_H_