Replace scoped_ptr with std::unique_ptr in //ui

ui/ozone/platform/headless/headless_window_manager.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 UI_OZONE_PLATFORM_HEADLESS_HEADLESS_WINDOW_MANAGER_H_
 #define UI_OZONE_PLATFORM_HEADLESS_HEADLESS_WINDOW_MANAGER_H_
 
 #include <stdint.h>
 
+#include <memory>
+
 #include "base/files/file_path.h"
 #include "base/id_map.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/ozone/public/surface_factory_ozone.h"
 
 namespace ui {
 
 class HeadlessWindow;
 
 class HeadlessWindowManager {
  public:
@@ skipping 20 matching lines @@
 
   IDMap<HeadlessWindow> windows_;
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(HeadlessWindowManager);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_HEADLESS_HEADLESS_WINDOW_MANAGER_H_