Intorudce DECLARE/DEFINE_ELEMENT_FACTORY_WITH_TAGNAME macros.

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 860 matching lines @@
 // These macros do the same as their NODE equivalents but additionally provide a template specialization
 // for isElementOfType<>() so that the Traversal<> API works for these Element types.
 #define DEFINE_ELEMENT_TYPE_CASTS(thisType, predicate) \
     template <> inline bool isElementOfType<const thisType>(const Element& element) { return element.predicate; } \
     DEFINE_NODE_TYPE_CASTS(thisType, predicate)
 
 #define DEFINE_ELEMENT_TYPE_CASTS_WITH_FUNCTION(thisType) \
     template <> inline bool isElementOfType<const thisType>(const Element& element) { return is##thisType(element); } \
     DEFINE_NODE_TYPE_CASTS_WITH_FUNCTION(thisType)
 
+#define DECLARE_ELEMENT_FACTORY_WITH_TAGNAME(T) \
+    static PassRefPtrWillBeRawPtr<T> create(const QualifiedName&, Document&)
+#define DEFINE_ELEMENT_FACTORY_WITH_TAGNAME(T) \
+    PassRefPtrWillBeRawPtr<T> T::create(const QualifiedName& tagName, Document& document) \
+    { \
+        return adoptRefWillBeRefCountedGarbageCollected(new T(tagName, document)); \
+    }
+
 } // namespace
 
 #endif