posinset and setsize for input type, radio, exposed in AX tree

third_party/WebKit/Source/core/html/forms/RadioInputType.cpp

 /*
  * Copyright (C) 2005, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google 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,
@@ skipping 190 matching lines @@
     m_isInClickHandler = false;
     // The work we did in willDispatchClick was default handling.
     event->setDefaultHandled();
 }
 
 bool RadioInputType::shouldAppearIndeterminate() const
 {
     return !element().checkedRadioButtonForGroup();
 }
 
+bool RadioInputType::isRadioButton() const
+{
+    return true;
+}
+
 } // namespace blink