HTMLCollection should not inherit NodeList

Source/core/html/HTMLCollection.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2011, 2012 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 629 matching lines @@
         if (!element->isHTMLElement())
             continue;
         const AtomicString& nameAttrVal = element->getNameAttribute();
         if (!nameAttrVal.isEmpty() && idAttrVal != nameAttrVal && (type() != DocAll || nameShouldBeVisibleInDocumentAll(toHTMLElement(element))))
             appendNameCache(nameAttrVal, element);
     }
 
     setHasNameCache();
 }
 
-bool HTMLCollection::hasNamedItem(const AtomicString& name) const
-{
-    if (name.isEmpty())
-        return false;
-
-    updateNameCache();
-
-    if (Vector<Element*>* cache = idCache(name)) {
-        if (!cache->isEmpty())
-            return true;
-    }
-
-    if (Vector<Element*>* cache = nameCache(name)) {
-        if (!cache->isEmpty())
-            return true;
-    }
-
-    return false;
-}
-
 void HTMLCollection::namedItems(const AtomicString& name, Vector<RefPtr<Node> >& result) const
 {
     ASSERT(result.isEmpty());
     if (name.isEmpty())
         return;
 
     updateNameCache();
 
     Vector<Element*>* idResults = idCache(name);
     Vector<Element*>* nameResults = nameCache(name);
 
     for (unsigned i = 0; idResults && i < idResults->size(); ++i)
         result.append(idResults->at(i));
 
     for (unsigned i = 0; nameResults && i < nameResults->size(); ++i)
         result.append(nameResults->at(i));
 }
 
 void HTMLCollection::append(NodeCacheMap& map, const AtomicString& key, Element* element)
 {
     OwnPtr<Vector<Element*> >& vector = map.add(key.impl(), nullptr).iterator->value;
     if (!vector)
         vector = adoptPtr(new Vector<Element*>);
     vector->append(element);
 }
 
 } // namespace WebCore