Replace scoped_ptr with std::unique_ptr in //ui

ui/message_center/views/message_popup_collection.h

Index: ui/message_center/views/message_popup_collection.h
diff --git a/ui/message_center/views/message_popup_collection.h b/ui/message_center/views/message_popup_collection.h
index 138035c59d352ab95c83272f946b7041ac0c5902..b255231bbc71d2e674bb91c798cb6cf8ca70b9eb 100644
--- a/ui/message_center/views/message_popup_collection.h
+++ b/ui/message_center/views/message_popup_collection.h
@@ -67,7 +67,7 @@ class MESSAGE_CENTER_EXPORT MessagePopupCollection
   void ClickOnNotification(const std::string& notification_id) override;
   void RemoveNotification(const std::string& notification_id,
                           bool by_user) override;
-  scoped_ptr<ui::MenuModel> CreateMenuModel(
+  std::unique_ptr<ui::MenuModel> CreateMenuModel(
       const NotifierId& notifier_id,
       const base::string16& display_source) override;
   bool HasClickedListener(const std::string& notification_id) override;
@@ -168,16 +168,16 @@ class MESSAGE_CENTER_EXPORT MessagePopupCollection
   // happens to be right under the mouse, and the user can just dispose of
   // multipel toasts by clicking. The mode ends when defer_timer_ expires.
   bool user_is_closing_toasts_by_clicking_;
-  scoped_ptr<base::OneShotTimer> defer_timer_;
+  std::unique_ptr<base::OneShotTimer> defer_timer_;
   // The top edge to align the position of the next toast during 'close by
   // clicking" mode.
   // Only to be used when user_is_closing_toasts_by_clicking_ is true.
   int target_top_edge_;
 
   // Weak, only exists temporarily in tests.
-  scoped_ptr<base::RunLoop> run_loop_for_test_;
+  std::unique_ptr<base::RunLoop> run_loop_for_test_;
 
-  scoped_ptr<MessageViewContextMenuController> context_menu_controller_;
+  std::unique_ptr<MessageViewContextMenuController> context_menu_controller_;
 
   // Gives out weak pointers to toast contents views which have an unrelated
   // lifetime.  Must remain the last member variable.