Check whether aria-expanded attribute is defined

Source/web/WebAXObject.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 256 matching lines @@
 }
 
 bool WebAXObject::isEnabled() const
 {
     if (isDetached())
         return 0;
 
     return m_private->isEnabled();
 }
 
-bool WebAXObject::isExpanded() const
+WebAXExpanded WebAXObject::isExpanded() const
 {
     if (isDetached())
-        return 0;
+        return WebAXExpandedUndefined;
 
-    return m_private->isExpanded();
+    return static_cast<WebAXExpanded>(m_private->isExpanded());
 }
 
 bool WebAXObject::isFocused() const
 {
     if (isDetached())
         return 0;
 
     return m_private->isFocused();
 }
 
@@ skipping 926 matching lines @@
     m_private = object;
     return *this;
 }
 
 WebAXObject::operator WTF::PassRefPtr<AXObject>() const
 {
     return m_private.get();
 }
 
 } // namespace blink