Refactoring activity logger.

Source/core/dom/Element.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2013 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 274 matching lines @@
 
     // For exposing to DOM only.
     NamedNodeMap* attributesForBindings() const;
 
     enum AttributeModificationReason {
         ModifiedDirectly,
         ModifiedByCloning
     };
 
     // This method is called whenever an attribute is added, changed or removed.
+    virtual void attributeWillChange(const QualifiedName&, const AtomicString&, const AtomicString&) { }
     virtual void attributeChanged(const QualifiedName&, const AtomicString&, AttributeModificationReason = ModifiedDirectly);
     virtual void parseAttribute(const QualifiedName&, const AtomicString&);
 
     virtual bool hasLegalLinkAttribute(const QualifiedName&) const;
     virtual const QualifiedName& subResourceAttributeName() const;
 
     // Only called by the parser immediately after element construction.
     void parserSetAttributes(const Vector<Attribute>&);
 
     // Remove attributes that might introduce scripting from the vector leaving the element unchanged.
@@ skipping 577 matching lines @@
     static PassRefPtrWillBeRawPtr<T> create(const QualifiedName&, Document&)
 #define DEFINE_ELEMENT_FACTORY_WITH_TAGNAME(T) \
     PassRefPtrWillBeRawPtr<T> T::create(const QualifiedName& tagName, Document& document) \
     { \
         return adoptRefWillBeNoop(new T(tagName, document)); \
     }
 
 } // namespace
 
 #endif