Replace scoped_ptr with std::unique_ptr in //ui

ui/message_center/message_center_tray.h

 // Copyright (c) 2013 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_MESSAGE_CENTER_MESSAGE_CENTER_TRAY_H_
 #define UI_MESSAGE_CENTER_MESSAGE_CENTER_TRAY_H_
 
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "base/strings/string16.h"
@@ skipping 44 matching lines @@
   // Causes an update if the popup bubble is already shown.
   void ShowPopupBubble();
 
   // Returns whether the popup was visible before.
   bool HidePopupBubble();
 
   // Toggles the visibility of the settings view in the message center bubble.
   void ShowNotifierSettingsBubble();
 
   // Creates a model for the context menu for a notification card.
-  scoped_ptr<ui::MenuModel> CreateNotificationMenuModel(
+  std::unique_ptr<ui::MenuModel> CreateNotificationMenuModel(
       const NotifierId& notifier_id,
       const base::string16& display_source);
 
   bool message_center_visible() { return message_center_visible_; }
   bool popups_visible() { return popups_visible_; }
   MessageCenterTrayDelegate* delegate() { return delegate_; }
   const message_center::MessageCenter* message_center() const {
     return message_center_;
   }
   message_center::MessageCenter* message_center() { return message_center_; }
@@ skipping 23 matching lines @@
   bool popups_visible_;
   // |delegate_| is a weak pointer that must live longer than MessageCenterTray.
   MessageCenterTrayDelegate* delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageCenterTray);
 };
 
 }  // namespace message_center
 
 #endif  // UI_MESSAGE_CENTER_MESSAGE_CENTER_TRAY_H_