Support union return type for anonymous named/indexed getter

Source/core/html/HTMLFormControlsCollection.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef HTMLFormControlsCollection_h
 #define HTMLFormControlsCollection_h
 
 #include "core/html/HTMLCollection.h"
+#include "core/html/RadioNodeList.h"
+#include "wtf/UnionType.h"
 
 namespace WebCore {
 
 class FormAssociatedElement;
 class HTMLElement;
 class HTMLImageElement;
 class QualifiedName;
 
 // This class is just a big hack to find form elements even in malformed HTML elements.
 // The famous <table><tr><form><td> problem.
 
 class HTMLFormControlsCollection : public HTMLCollection {
 public:
     static PassRefPtr<HTMLFormControlsCollection> create(Node*, CollectionType);
 
     virtual ~HTMLFormControlsCollection();
 
     virtual Node* namedItem(const AtomicString& name) const;
+    WTF::UnionType2<RadioNodeList, Node> namedGetter(const AtomicString& name);
 
 private:
     HTMLFormControlsCollection(Node*);
 
     virtual void updateNameCache() const;
 
     const Vector<FormAssociatedElement*>& formControlElements() const;
     const Vector<HTMLImageElement*>& formImageElements() const;
     virtual Element* virtualItemAfter(unsigned& offsetInArray, Element*) const OVERRIDE;
 };
 
 } // namespace
 
 #endif