Change old code from "unloadListnerChanged" model to new WebKit EnableSuddenT...

third_party/WebKit/WebCore/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 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 2879 matching lines @@
     if (m_frame)
          m_frame->eventHandler()->addPendingFrameBeforeUnloadEventCount();
 }
 
 void Document::removePendingFrameBeforeUnloadEventCount() 
 {
     if (m_frame)
         m_frame->eventHandler()->removePendingFrameBeforeUnloadEventCount();
 }
 
-bool Document::hasUnloadEventListener()
-{
-  return (hasWindowEventListener(eventNames().unloadEvent) || 
-          hasWindowEventListener(eventNames().beforeunloadEvent));
-}
-
 PassRefPtr<EventListener> Document::createEventListener(const String& functionName, const String& code, Node* node)
 {
     Frame* frm = frame();
     if (!frm || !frm->script()->isEnabled())
         return 0;
 
 #if ENABLE(SVG)
     if (node ? node->isSVGElement() : isSVGDocument())
         return frm->script()->createSVGEventHandler(functionName, code, node);
 #endif
@@ skipping 1567 matching lines @@
         !m_haveExplicitlyDisabledDNSPrefetch) {
         m_isDNSPrefetchEnabled = true;
         return;
     }
 
     m_isDNSPrefetchEnabled = false;
     m_haveExplicitlyDisabledDNSPrefetch = true;
 }
 
 } // namespace WebCore