Make IDL Callbacks non-refcounted by default

Source/modules/notifications/Notification.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 230 matching lines @@
     case NotificationClient::PermissionDenied:
         return deniedPermission;
     case NotificationClient::PermissionNotAllowed:
         return defaultPermission;
     }
 
     ASSERT_NOT_REACHED();
     return deniedPermission;
 }
 
-void Notification::requestPermission(ExecutionContext* context, PassRefPtr<NotificationPermissionCallback> callback)
+void Notification::requestPermission(ExecutionContext* context, PassOwnPtr<NotificationPermissionCallback> callback)
 {
     ASSERT(toDocument(context)->page());
     NotificationController::from(toDocument(context)->page())->client()->requestPermission(context, callback);
 }
 
 } // namespace WebCore