Move modules-dependent eventtarget code out of core.

Source/modules/encryptedmedia/MediaKeys.h

 /*
  * Copyright (C) 2013 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 11 matching lines @@
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  * THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef MediaKeys_h
 #define MediaKeys_h
 
 #include "bindings/v8/ScriptWrappable.h"
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/dom/ExecutionContext.h"
-#include "core/events/EventTarget.h"
+#include "modules/EventTargetModules.h"
 #include "modules/encryptedmedia/MediaKeySession.h"
 #include "platform/Timer.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Deque.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/Uint8Array.h"
 #include "wtf/Vector.h"
 #include "wtf/text/WTFString.h"
 
@@ skipping 55 matching lines @@
     Timer<MediaKeys> m_initializeNewSessionTimer;
 
 #if !ENABLE(OILPAN)
     WeakPtrFactory<MediaKeys> m_weakFactory;
 #endif
 };
 
 }
 
 #endif // MediaKeys_h