Add DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION() macro

Source/core/html/HTMLTextFormControlElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2009, 2010, 2011 Google 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 117 matching lines @@
     virtual void handleBlurEvent() { }
 
     String m_textAsOfLastFormControlChangeEvent;
     bool m_lastChangeWasUserEdit;
 
     int m_cachedSelectionStart;
     int m_cachedSelectionEnd;
     TextFieldSelectionDirection m_cachedSelectionDirection;
 };
 
-inline bool isHTMLTextFormControlElement(const Node& node)
+inline bool isHTMLTextFormControlElement(const Element& element)
 {
-    return node.isElementNode() && toElement(node).isTextFormControl();
+    return element.isTextFormControl();
 }
 
-DEFINE_ELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLTextFormControlElement);
+DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLTextFormControlElement);
 
 HTMLTextFormControlElement* enclosingTextFormControl(const Position&);
 
 } // namespace
 
 #endif