blink: Cleanup class/struct forward declarations

third_party/WebKit/Source/core/input/EventHandler.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010, 2011 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 35 matching lines @@
 #include "platform/scroll/ScrollTypes.h"
 #include "public/platform/WebInputEvent.h"
 #include "public/platform/WebInputEventResult.h"
 #include "wtf/Forward.h"
 #include "wtf/HashMap.h"
 #include "wtf/HashTraits.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
-class ContainerNode;
 class DataTransfer;
 class PaintLayer;
 class Element;
 class Event;
 class EventTarget;
 template <typename EventType>
 class EventWithHitTestResults;
 class FloatQuad;
 class FrameHost;
 class HTMLFrameSetElement;
 class HitTestRequest;
 class HitTestResult;
 class LayoutObject;
 class LocalFrame;
 class Node;
 class OptionalCursor;
 class PlatformGestureEvent;
 class PlatformTouchEvent;
 class PlatformWheelEvent;
 class ScrollableArea;
 class Scrollbar;
 class SelectionController;
 class TextEvent;
-class WheelEvent;
 
 class CORE_EXPORT EventHandler final
     : public GarbageCollectedFinalized<EventHandler> {
   WTF_MAKE_NONCOPYABLE(EventHandler);
 
  public:
   explicit EventHandler(LocalFrame&);
   DECLARE_TRACE();
 
   void clear();
@@ skipping 296 matching lines @@
 
   // Set on GestureTapDown if the |pointerdown| event corresponding to the
   // triggering |touchstart| event was canceled. This suppresses mouse event
   // firing for the current gesture sequence (i.e. until next GestureTapDown).
   bool m_suppressMouseEventsFromGestures;
 };
 
 }  // namespace blink
 
 #endif  // EventHandler_h