Remove isolated world parameters from event listener attributes

Source/core/dom/MessagePort.h

 /*
  * Copyright (C) 2008 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 72 matching lines @@
     bool started() const { return m_started; }
 
     virtual const AtomicString& interfaceName() const OVERRIDE;
     virtual ExecutionContext* executionContext() const OVERRIDE { return ActiveDOMObject::executionContext(); }
     virtual MessagePort* toMessagePort() OVERRIDE { return this; }
 
     // ActiveDOMObject implementation.
     virtual bool hasPendingActivity() const OVERRIDE;
     virtual void stop() OVERRIDE { close(); }
 
-    void setOnmessage(PassRefPtr<EventListener> listener, DOMWrapperWorld* world)
+    void setOnmessage(PassRefPtr<EventListener> listener)
     {
-        setAttributeEventListener(EventTypeNames::message, listener, world);
+        setAttributeEventListener(EventTypeNames::message, listener);
         start();
     }
-    EventListener* onmessage(DOMWrapperWorld* world) { return getAttributeEventListener(EventTypeNames::message, world); }
+    EventListener* onmessage() { return getAttributeEventListener(EventTypeNames::message); }
 
     // A port starts out its life entangled, and remains entangled until it is closed or is cloned.
     bool isEntangled() const { return !m_closed && !isNeutered(); }
 
     // A port gets neutered when it is transferred to a new owner via postMessage().
     bool isNeutered() const { return !m_entangledChannel; }
 
 private:
     explicit MessagePort(ExecutionContext&);
 
     // WebMessagePortChannelClient implementation.
     virtual void messageAvailable() OVERRIDE;
     void dispatchMessages();
 
     OwnPtr<blink::WebMessagePortChannel> m_entangledChannel;
 
     bool m_started;
     bool m_closed;
 
     WeakPtrFactory<MessagePort> m_weakFactory;
 };
 
 } // namespace WebCore
 
 #endif // MessagePort_h