Generate isHTML*Element() / toHTML*Element() helper functions

Source/core/html/HTMLObjectElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2008, 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 93 matching lines @@
     virtual void refFormAssociatedElement() OVERRIDE { ref(); }
     virtual void derefFormAssociatedElement() OVERRIDE { deref(); }
 
     virtual bool shouldRegisterAsNamedItem() const OVERRIDE { return true; }
     virtual bool shouldRegisterAsExtraNamedItem() const OVERRIDE { return true; }
 
     String m_classId;
     bool m_useFallbackContent : 1;
 };
 
-DEFINE_NODE_TYPE_CASTS(HTMLObjectElement, hasTagName(HTMLNames::objectTag));
+// Intentionally left unimplemented, template specialization needs to be provided for specific
+// return types.
+template<typename T> inline const T& toElement(const FormAssociatedElement&);

[Inactive, 2014/02/23 18:27:33]

I made toHTMLObjectElement() accept a FormAssociatedElement as input instead of
a Node.

To do so, we are now overloading
template<typename T> inline const T& toElement(const Node&)
template<typename T> inline const T* toElement(const Node*)

instead of:
const HTMLObjectElement& toHTMLObjectElement(const Node&);
const HTMLObjectElement* toHTMLObjectElement(const Node*);

as toHTMLObjectElement is now a macro calling toElement<HTMLObjectElement>().

+template<typename T> inline const T* toElement(const FormAssociatedElement*);
 
-inline const HTMLObjectElement* toHTMLObjectElement(const FormAssociatedElement* element)
+// Make toHTMLObjectElement() accept a FormAssociatedElement as input instead of a Node.
+template<> inline const HTMLObjectElement* toElement<HTMLObjectElement>(const FormAssociatedElement* element)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!element || !element->isFormControlElement());
     const HTMLObjectElement* objectElement = static_cast<const HTMLObjectElement*>(element);
     // We need to assert after the cast because FormAssociatedElement doesn't
     // have hasTagName.
     ASSERT_WITH_SECURITY_IMPLICATION(!objectElement || objectElement->hasTagName(HTMLNames::objectTag));
     return objectElement;
 }
 
-inline const HTMLObjectElement& toHTMLObjectElement(const FormAssociatedElement& element)
+template<> inline const HTMLObjectElement& toElement<HTMLObjectElement>(const FormAssociatedElement& element)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!element.isFormControlElement());
     const HTMLObjectElement& objectElement = static_cast<const HTMLObjectElement&>(element);
     // We need to assert after the cast because FormAssociatedElement doesn't
     // have hasTagName.
     ASSERT_WITH_SECURITY_IMPLICATION(objectElement.hasTagName(HTMLNames::objectTag));
     return objectElement;
 }
 
 }
 
 #endif