Support named query generation

Source/core/dom/DOMStringMap.h

 /*
  * Copyright (C) 2010 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 51 matching lines @@
         // Behavior of Firefox and Opera are same.
         // delete document.body.dataset["-foo"] // false instead of DOM Exception 12
         // LayoutTests/fast/dom/HTMLSelectElement/select-selectedIndex-multiple.html
         ec = 0;
         return result;
     }
     void namedPropertyEnumerator(Vector<String>& names, ExceptionCode&)
     {
         getNames(names);
     }
+    bool namedPropertyQuery(const AtomicString&, ExceptionCode&);
 
     virtual Element* element() = 0;
 
 protected:
     DOMStringMap()
     {
         ScriptWrappable::init(this);
     }
 };
 
 } // namespace WebCore
 
 #endif // DOMStringMap_h