Convert //chrome/browser/ui from scoped_ptr to std::unique_ptr

chrome/browser/ui/app_list/arc/arc_app_item.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 CHROME_BROWSER_UI_APP_LIST_ARC_ARC_APP_ITEM_H_
 #define CHROME_BROWSER_UI_APP_LIST_ARC_ARC_APP_ITEM_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 40 matching lines @@
   void OnIconUpdated(ArcAppIcon* icon) override;
 
  private:
   // Updates the app item's icon, if necessary making it gray.
   void UpdateIcon();
 
   // Set the position from the ordering.
   void UpdatePositionFromOrdering();
 
   bool ready_;
-  scoped_ptr<ArcAppIcon> arc_app_icon_;
-  scoped_ptr<ArcAppContextMenu> context_menu_;
+  std::unique_ptr<ArcAppIcon> arc_app_icon_;
+  std::unique_ptr<ArcAppContextMenu> context_menu_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcAppItem);
 };
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_ARC_ARC_APP_ITEM_H_