Use stricter typing for HTMLCollection named getter

Source/core/html/HTMLOptionsCollection.cpp

 /*
  * Copyright (C) 2006, 2011, 2012 Apple Computer, Inc.
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 78 matching lines @@
 void HTMLOptionsCollection::setSelectedIndex(int index)
 {
     toHTMLSelectElement(ownerNode())->setSelectedIndex(index);
 }
 
 void HTMLOptionsCollection::setLength(unsigned length, ExceptionState& exceptionState)
 {
     toHTMLSelectElement(ownerNode())->setLength(length, exceptionState);
 }
 
-void HTMLOptionsCollection::anonymousNamedGetter(const AtomicString& name, bool& returnValue0Enabled, RefPtr<NodeList>& returnValue0, bool& returnValue1Enabled, RefPtr<Node>& returnValue1)
+void HTMLOptionsCollection::anonymousNamedGetter(const AtomicString& name, bool& returnValue0Enabled, RefPtr<NodeList>& 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;
     }
@@ skipping 15 matching lines @@
     if (!value) {
         exceptionState.throwTypeError(ExceptionMessages::failedToSet(String::number(index), "HTMLOptionsCollection", "The element provided was not an HTMLOptionElement."));
         return true;
     }
     base->setOption(index, value.get(), exceptionState);
     return true;
 }
 
 } //namespace