Remove dead notification for number of wheel event handlers

Source/core/page/ChromeClient.h

 /*
  * Copyright (C) 2006, 2007, 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.
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 197 matching lines @@
     virtual String acceptLanguages() = 0;
 
     enum DialogType {
         AlertDialog = 0,
         ConfirmDialog = 1,
         PromptDialog = 2,
         HTMLDialog = 3
     };
     virtual bool shouldRunModalDialogDuringPageDismissal(const DialogType&, const String&, Document::PageDismissalType) const { return true; }
 
-    virtual void numWheelEventHandlersChanged(unsigned) = 0;
-
     virtual bool isSVGImageChromeClient() const { return false; }
 
     virtual bool requestPointerLock() { return false; }
     virtual void requestPointerUnlock() { }
 
     virtual FloatSize minimumWindowSize() const { return FloatSize(100, 100); };
 
     virtual bool isChromeClientImpl() const { return false; }
 
     virtual void didAssociateFormControls(const WillBeHeapVector<RefPtrWillBeMember<Element> >&) { };
     virtual void didChangeValueInTextField(HTMLFormControlElement&) { }
     virtual void didEndEditingOnTextField(HTMLInputElement&) { }
     virtual void handleKeyboardEventOnTextField(HTMLInputElement&, KeyboardEvent&) { }
 
     // FIXME: Remove this method once we have input routing in the browser
     // process. See http://crbug.com/339659.
     virtual void forwardInputEvent(WebCore::Frame*, WebCore::Event*) { }
 
     // Input mehtod editor related functions.
     virtual void didCancelCompositionOnSelectionChange() { }
     virtual void willSetInputMethodState() { }
     virtual void didUpdateTextOfFocusedElementByNonUserInput() { }
 
 protected:
     virtual ~ChromeClient() { }
 };
 
 }
 #endif // ChromeClient_h