Remove dead notification for number of wheel event handlers

Source/core/loader/EmptyClients.h

 /*
  * Copyright (C) 2006 Eric Seidel (eric@webkit.org)
  * Copyright (C) 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2012 Samsung Electronics. 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
@@ skipping 138 matching lines @@
 
     virtual void runOpenPanel(LocalFrame*, PassRefPtr<FileChooser>) OVERRIDE;
 
     virtual void setCursor(const Cursor&) OVERRIDE { }
 
     virtual void attachRootGraphicsLayer(GraphicsLayer*) OVERRIDE { }
 
     virtual void needTouchEvents(bool) OVERRIDE { }
     virtual void setTouchAction(TouchAction touchAction) OVERRIDE { };
 
-    virtual void numWheelEventHandlersChanged(unsigned) OVERRIDE { }
-
     virtual void didAssociateFormControls(const WillBeHeapVector<RefPtrWillBeMember<Element> >&) OVERRIDE { }
 
     virtual void annotatedRegionsChanged() OVERRIDE { }
     virtual bool paintCustomOverhangArea(GraphicsContext*, const IntRect&, const IntRect&, const IntRect&) OVERRIDE { return false; }
     virtual String acceptLanguages() OVERRIDE;
 };
 
 class EmptyFrameLoaderClient FINAL : public FrameLoaderClient {
     WTF_MAKE_NONCOPYABLE(EmptyFrameLoaderClient); WTF_MAKE_FAST_ALLOCATED;
 public:
@@ skipping 161 matching lines @@
 public:
     virtual PassOwnPtr<StorageNamespace> createSessionStorageNamespace() OVERRIDE;
     virtual bool canAccessStorage(LocalFrame*, StorageType) const OVERRIDE { return false; }
 };
 
 void fillWithEmptyClients(Page::PageClients&);
 
 }
 
 #endif // EmptyClients_h