Support union return type for anonymous named/indexed 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 143 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();
 }
 
+WTF::UnionType2<RadioNodeList, Node> HTMLFormControlsCollection::namedGetter(const AtomicString& name)
+{
+    Vector<RefPtr<Node> > namedItems;
+    this->namedItems(name, namedItems);
+
+    if (!namedItems.size())
+        return WTF::UnionType2<RadioNodeList, Node>();
+
+    if (namedItems.size() == 1)
+        return WTF::UnionType2<RadioNodeList, Node>(namedItems.at(0).release());
+
+    return WTF::UnionType2<RadioNodeList, Node>(this->ownerNode()->radioNodeList(name));
 }
+
+}