Introduce toHTMLMapElement

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 34 matching lines @@
 
 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;
+    return element->hasTagName(mapTag) && toHTMLMapElement(element)->getName().impl() == key;
 }
 
 inline bool keyMatchesLowercasedMapName(AtomicStringImpl* key, Element* element)
 {
-    return element->hasTagName(mapTag) && static_cast<HTMLMapElement*>(element)->getName().lower().impl() == key;
+    return element->hasTagName(mapTag) && toHTMLMapElement(element)->getName().lower().impl() == key;
 }
 
 inline bool keyMatchesLabelForAttribute(AtomicStringImpl* key, Element* element)
 {
     return isHTMLLabelElement(element) && element->getAttribute(forAttr).impl() == key;
 }
 
 void DocumentOrderedMap::clear()
 {
     m_map.clear();
@@ skipping 91 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