Move modules-dependent Event code out of core.

Source/modules/mediastream/RTCDataChannelEvent.h

 /*
  * Copyright (C) 2012 Google 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
  *     documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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 #ifndef RTCDataChannelEvent_h
 #define RTCDataChannelEvent_h
 
-#include "core/events/Event.h"
+#include "modules/EventModules.h"
 #include "modules/mediastream/RTCDataChannel.h"
 #include "wtf/text/AtomicString.h"
 
 namespace WebCore {
 
 class RTCDataChannelEvent FINAL : public Event {
 public:
     virtual ~RTCDataChannelEvent();
 
     static PassRefPtrWillBeRawPtr<RTCDataChannelEvent> create();
     static PassRefPtrWillBeRawPtr<RTCDataChannelEvent> create(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtrWillBeRawPtr<RTCDataChannel>);
 
     RTCDataChannel* channel() const;
 
     virtual const AtomicString& interfaceName() const OVERRIDE;
 
     virtual void trace(Visitor*) OVERRIDE;
 
 private:
     RTCDataChannelEvent();
     RTCDataChannelEvent(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtrWillBeRawPtr<RTCDataChannel>);
 
     RefPtrWillBeMember<RTCDataChannel> m_channel;
 };
 
 } // namespace WebCore
 
 #endif // RTCDataChannelEvent_h