Introduce isHTMLLabelElement and toHTMLLabelElement

Source/core/dom/DocumentOrderedMap.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 18 matching lines @@
  */
 
 #include "config.h"
 #include "core/dom/DocumentOrderedMap.h"
 
 #include "HTMLNames.h"
 #include "core/dom/Element.h"
 #include "core/dom/NodeTraversal.h"
 #include "core/dom/TreeScope.h"
 #include "core/dom/WebCoreMemoryInstrumentation.h"
+#include "core/html/HTMLLabelElement.h"
 #include "core/html/HTMLMapElement.h"
 #include <wtf/MemoryInstrumentationHashCountedSet.h>
 #include <wtf/MemoryInstrumentationHashMap.h>
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 inline bool keyMatchesId(AtomicStringImpl* key, Element* element)
 {
     return element->getIdAttribute().impl() == key;
 }
 
 inline bool keyMatchesMapName(AtomicStringImpl* key, Element* element)
 {
     return element->hasTagName(mapTag) && static_cast<HTMLMapElement*>(element)->getName().impl() == key;
 }
 
 inline bool keyMatchesLowercasedMapName(AtomicStringImpl* key, Element* element)
 {
     return element->hasTagName(mapTag) && static_cast<HTMLMapElement*>(element)->getName().lower().impl() == key;
 }
 
 inline bool keyMatchesLabelForAttribute(AtomicStringImpl* key, Element* element)
 {
-    return element->hasTagName(labelTag) && element->getAttribute(forAttr).impl() == key;
+    return isHTMLLabelElement(element) && element->getAttribute(forAttr).impl() == key;
 }
 
 void DocumentOrderedMap::clear()
 {
     m_map.clear();
     m_duplicateCounts.clear();
 }
 
 void DocumentOrderedMap::add(AtomicStringImpl* key, Element* element)
 {
@@ skipping 86 matching lines @@
 }
 
 void DocumentOrderedMap::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
 {
     MemoryClassInfo info(memoryObjectInfo, this, WebCoreMemoryTypes::DOM);
     info.addMember(m_map, "map");
     info.addMember(m_duplicateCounts, "duplicateCounts");
 }
 
 } // namespace WebCore