Have HTMLCollection::item() return an Element as per specification

Source/core/html/HTMLSelectElement.cpp

 /*
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
@@ skipping 368 matching lines @@
     // selection as single-line and multi-line has different defaults.
     if (oldMultiple != this->multiple())
         setSelectedIndex(oldSelectedIndex);
 }
 
 void HTMLSelectElement::setSize(int size)
 {
     setIntegralAttribute(sizeAttr, size);
 }
 
-Node* HTMLSelectElement::namedItem(const AtomicString& name)
+Element* HTMLSelectElement::namedItem(const AtomicString& name)
 {
     return options()->namedItem(name);
 }
 
-Node* HTMLSelectElement::item(unsigned index)
+Element* HTMLSelectElement::item(unsigned index)
 {
     return options()->item(index);
 }
 
 void HTMLSelectElement::setOption(unsigned index, HTMLOptionElement* option, ExceptionState& exceptionState)
 {
     if (index > maxSelectItems - 1)
         index = maxSelectItems - 1;
     int diff = index - length();
     RefPtr<HTMLElement> before = 0;
@@ skipping 1157 matching lines @@
 {
     return true;
 }
 
 bool HTMLSelectElement::supportsAutofocus() const
 {
     return true;
 }
 
 } // namespace