Add DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION() macro

Source/core/html/HTMLElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009 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
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 119 matching lines @@
 template <typename T> bool isElementOfType(const HTMLElement&);
 template <> inline bool isElementOfType<HTMLElement>(const HTMLElement&) { return true; }
 
 inline HTMLElement::HTMLElement(const QualifiedName& tagName, Document& document, ConstructionType type = CreateHTMLElement)
     : Element(tagName, &document, type)
 {
     ASSERT(!tagName.localName().isNull());
     ScriptWrappable::init(this);
 }
 
+// This requires isHTML*Element(const Element&) and isHTML*Element(const HTMLElement&).
+// When the input element is an HTMLElement, we don't need to check the namespace URI, just the local name.
+#define DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(thisType) \
+    inline bool is##thisType(const thisType* element); \
+    inline bool is##thisType(const thisType& element); \
+    inline bool is##thisType(const HTMLElement* element) { return element && is##thisType(*element); } \
+    inline bool is##thisType(const Element* element) { return element && is##thisType(*element); } \
+    inline bool is##thisType(const Node& node) { return node.isElementNode() ? is##thisType(toElement(node)) : false; } \
+    inline bool is##thisType(const Node* node) { return node && node->isElementNode() ? is##thisType(*toElement(node)) : false; } \
+    template<typename T> inline bool is##thisType(const PassRefPtr<T>& node) { return is##thisType(node.get()); } \
+    template<typename T> inline bool is##thisType(const RefPtr<T>& node) { return is##thisType(node.get()); } \
+    template <> inline bool isElementOfType<const thisType>(const HTMLElement& element) { return is##thisType(element); } \
+    DEFINE_ELEMENT_TYPE_CASTS_WITH_FUNCTION(thisType)
+
 } // namespace WebCore
 
 #include "HTMLElementTypeHelpers.h"
 
 #endif // HTMLElement_h