blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/events/Event.h

 /*
  * Copyright (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights
  * reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 19 matching lines @@
 #include "core/dom/DOMHighResTimeStamp.h"
 #include "core/dom/DOMTimeStamp.h"
 #include "core/events/EventInit.h"
 #include "core/events/EventPath.h"
 #include "platform/heap/Handle.h"
 #include "wtf/text/AtomicString.h"
 
 namespace blink {
 
 class DOMWrapperWorld;
+class EventDispatchMediator;
 class EventTarget;
 class ExecutionContext;
 
 class CORE_EXPORT Event : public GarbageCollectedFinalized<Event>,
                           public ScriptWrappable {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   enum PhaseType {
     kNone = 0,
@@ skipping 255 matching lines @@
   double m_platformTimeStamp;
 };
 
 #define DEFINE_EVENT_TYPE_CASTS(typeName)                          \
   DEFINE_TYPE_CASTS(typeName, Event, event, event->is##typeName(), \
                     event.is##typeName())
 
 }  // namespace blink
 
 #endif  // Event_h