Migrate wheel events to EventHandlerRegistry

Source/core/frame/DOMWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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
@@ skipping 398 matching lines @@
         if (ScrollingCoordinator* scrollingCoordinator = m_frame->page()->scrollingCoordinator()) {
             scrollingCoordinator->scrollableAreaScrollbarLayerDidChange(m_frame->view(), HorizontalScrollbar);
             scrollingCoordinator->scrollableAreaScrollbarLayerDidChange(m_frame->view(), VerticalScrollbar);
             scrollingCoordinator->scrollableAreaScrollLayerDidChange(m_frame->view());
         }
     }
 
     m_frame->selection().updateSecureKeyboardEntryIfActive();
 
     if (m_frame->isMainFrame()) {
-        m_frame->notifyChromeClientWheelEventHandlerCountChanged();
         if (m_document->hasTouchEventHandlers())
             m_frame->host()->chrome().client().needTouchEvents(true);
     }
 
     // FIXME: Oilpan: Remove .get() when m_document becomes Member<>.
     return m_document.get();
 }
 
 EventQueue* DOMWindow::eventQueue() const
 {
@@ skipping 1485 matching lines @@
     visitor->trace(m_sessionStorage);
     visitor->trace(m_localStorage);
     visitor->trace(m_applicationCache);
     visitor->trace(m_performance);
     visitor->trace(m_css);
     WillBeHeapSupplementable<DOMWindow>::trace(visitor);
     EventTargetWithInlineData::trace(visitor);
 }
 
 } // namespace WebCore