Use stricter typing for HTMLCollection named getter

Source/core/html/HTMLFormControlsCollection.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2010, 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 116 matching lines @@
         HTMLImageElement* element = (*imageElementsArray)[i];
         if (element->fastGetAttribute(attrName) == name) {
             UseCounter::count(element->document(), UseCounter::FormNameAccessForImageElement);
             return element;
         }
     }
 
     return 0;
 }
 
-Node* HTMLFormControlsCollection::namedItem(const AtomicString& name) const
+Element* HTMLFormControlsCollection::namedItem(const AtomicString& name) const
 {
     // http://msdn.microsoft.com/workshop/author/dhtml/reference/methods/nameditem.asp
     // This method first searches for an object with a matching id
     // attribute. If a match is not found, the method then searches for an
     // object with a matching name attribute, but only on those elements
     // that are allowed a name attribute.
     const Vector<HTMLImageElement*>* imagesElements = ownerNode()->hasTagName(fieldsetTag) ? 0 : &formImageElements();
     if (HTMLElement* item = firstNamedItem(formControlElements(), imagesElements, idAttr, name))
         return item;
 
@@ skipping 35 matching lines @@
             if (!idAttrVal.isEmpty() && !foundInputElements.contains(idAttrVal.impl()))
                 appendIdCache(idAttrVal, element);
             if (!nameAttrVal.isEmpty() && idAttrVal != nameAttrVal && !foundInputElements.contains(nameAttrVal.impl()))
                 appendNameCache(nameAttrVal, element);
         }
     }
 
     setHasNameCache();
 }
 
-void HTMLFormControlsCollection::namedGetter(const AtomicString& name, bool& returnValue0Enabled, RefPtr<RadioNodeList>& returnValue0, bool& returnValue1Enabled, RefPtr<Node>& returnValue1)
+void HTMLFormControlsCollection::namedGetter(const AtomicString& name, bool& returnValue0Enabled, RefPtr<RadioNodeList>& returnValue0, bool& returnValue1Enabled, RefPtr<Element>& returnValue1)
 {
-    Vector<RefPtr<Node> > namedItems;
+    Vector<RefPtr<Element> > namedItems;
     this->namedItems(name, namedItems);
 
     if (!namedItems.size())
         return;
 
     if (namedItems.size() == 1) {
         returnValue1Enabled = true;
         returnValue1 = namedItems.at(0);
         return;
     }
 
     returnValue0Enabled = true;
     returnValue0 = this->ownerNode()->radioNodeList(name);
 }
 
 }