Replace scoped_ptr with std::unique_ptr in //ui

ui/message_center/message_center.h

Index: ui/message_center/message_center.h
diff --git a/ui/message_center/message_center.h b/ui/message_center/message_center.h
index d6ce0c38acbd1d19ed84ec7dab0cf7b56a224de4..038c7b712e622f18f021f78fddb28f8f3084c669 100644
--- a/ui/message_center/message_center.h
+++ b/ui/message_center/message_center.h
@@ -7,10 +7,10 @@
 
 #include <stddef.h>
 
+#include <memory>
 #include <string>
 
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "ui/message_center/message_center_export.h"
 #include "ui/message_center/message_center_types.h"
 #include "ui/message_center/notification_list.h"
@@ -100,12 +100,12 @@ class MESSAGE_CENTER_EXPORT MessageCenter {
   // Basic operations of notification: add/remove/update.
 
   // Adds a new notification.
-  virtual void AddNotification(scoped_ptr<Notification> notification) = 0;
+  virtual void AddNotification(std::unique_ptr<Notification> notification) = 0;
 
   // Updates an existing notification with id = old_id and set its id to new_id.
   virtual void UpdateNotification(
       const std::string& old_id,
-      scoped_ptr<Notification> new_notification) = 0;
+      std::unique_ptr<Notification> new_notification) = 0;
 
   // Removes an existing notification.
   virtual void RemoveNotification(const std::string& id, bool by_user) = 0;