IDL: Generate union type containers

Source/core/html/HTMLFormElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 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 21 matching lines @@
 #include "wtf/WeakPtr.h"
 
 namespace blink {
 
 class Event;
 class FormAssociatedElement;
 class GenericEventQueue;
 class HTMLFormControlElement;
 class HTMLFormControlsCollection;
 class HTMLImageElement;
+class RadioNodeListOrElement;
 
 class HTMLFormElement final : public HTMLElement {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtrWillBeRawPtr<HTMLFormElement> create(Document&);
     virtual ~HTMLFormElement();
     virtual void trace(Visitor*) override;
 
     void setNeedsValidityCheck();
 
@@ skipping 58 matching lines @@
     void finishRequestAutocomplete(AutocompleteResult);
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(autocomplete);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(autocompleteerror);
 
     RadioButtonGroupScope& radioButtonGroupScope() { return m_radioButtonGroupScope; }
 
     const FormAssociatedElement::List& associatedElements() const;
     const WillBeHeapVector<RawPtrWillBeMember<HTMLImageElement> >& imageElements();
 
-    void anonymousNamedGetter(const AtomicString& name, RefPtrWillBeRawPtr<RadioNodeList>&, RefPtrWillBeRawPtr<Element>&);
+    void anonymousNamedGetter(const AtomicString& name, RadioNodeListOrElement&);
 
 private:
     explicit HTMLFormElement(Document&);
 
     virtual bool rendererIsNeeded(const RenderStyle&) override;
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) override;
     virtual void removedFrom(ContainerNode*) override;
     virtual void finishParsingChildren() override;
 
     virtual void handleLocalEvents(Event*) override;
@@ skipping 53 matching lines @@
     bool m_isInResetFunction : 1;
 
     bool m_wasDemoted : 1;
 
     OwnPtrWillBeMember<GenericEventQueue> m_pendingAutocompleteEventsQueue;
 };
 
 } // namespace blink
 
 #endif // HTMLFormElement_h