Fixes the policy to choose the notifications for popups.

ui/message_center/notification_list.h

 // Copyright (c) 2012 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_NOTIFICATION_LIST_H_
 #define UI_MESSAGE_CENTER_NOTIFICATION_LIST_H_
 
 #include <list>
 #include <map>
 #include <string>
@@ skipping 163 matching lines @@
   bool GetNotification(const std::string& id, Notifications::iterator* iter);
 
   void EraseNotification(Notifications::iterator iter);
 
   void PushNotification(Notification& notification);
 
   // Returns the recent notifications of the |priority| that have not been shown
   // as a popup. kMaxVisiblePopupNotifications are used to limit the number of
   // notifications for the default priority.
   void GetPopupIterators(int priority,
-                         Notifications::iterator& first,
-                         Notifications::iterator& last);
+                         Notifications::iterator* first,
+                         Notifications::iterator* last);
 
   // Given a dictionary of optional notification fields (or NULL), unpacks all
   // recognized values into the given Notification struct. We assume prior
   // proper initialization of |notification| fields that correspond to
   // |optional_fields|.
   void UnpackOptionalFields(const base::DictionaryValue* optional_fields,
                             Notification* notification);
 
   // Sets the current quiet mode status to |quiet_mode|.
   void SetQuietModeInternal(bool quiet_mode);
 
   Delegate* delegate_;
   NotificationMap notifications_;
   bool message_center_visible_;
   size_t unread_count_;
   bool quiet_mode_;
   scoped_ptr<base::OneShotTimer<NotificationList> > quiet_mode_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(NotificationList);
 };
 
 }  // namespace message_center
 
 #endif // UI_MESSAGE_CENTER_NOTIFICATION_LIST_H_