Remove beforeload events.

Source/core/dom/Document.h

 /*
  * 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, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 681 matching lines @@
         DOMNODEINSERTED_LISTENER             = 1 << 1,
         DOMNODEREMOVED_LISTENER              = 1 << 2,
         DOMNODEREMOVEDFROMDOCUMENT_LISTENER  = 1 << 3,
         DOMNODEINSERTEDINTODOCUMENT_LISTENER = 1 << 4,
         DOMCHARACTERDATAMODIFIED_LISTENER    = 1 << 5,
         OVERFLOWCHANGED_LISTENER             = 1 << 6,
         ANIMATIONEND_LISTENER                = 1 << 7,
         ANIMATIONSTART_LISTENER              = 1 << 8,
         ANIMATIONITERATION_LISTENER          = 1 << 9,
         TRANSITIONEND_LISTENER               = 1 << 10,
-        BEFORELOAD_LISTENER                  = 1 << 11,
         SCROLL_LISTENER                      = 1 << 12
-        // 3 bits remaining
+        // 4 bits remaining
     };
 
     bool hasListenerType(ListenerType listenerType) const { return (m_listenerTypes & listenerType); }
     void addListenerTypeIfNeeded(const AtomicString& eventType);
 
     bool hasMutationObserversOfType(MutationObserver::MutationType type) const
     {
         return m_mutationObserverTypes & type;
     }
     bool hasMutationObservers() const { return m_mutationObserverTypes; }
@@ skipping 692 matching lines @@
 inline bool Node::isDocumentNode() const
 {
     return this == document();
 }
 
 Node* eventTargetNodeForDocument(Document*);
 
 } // namespace WebCore
 
 #endif // Document_h