Remove unused feature ElementSetAttributeNodeNS

Source/core/frame/UseCounter.h

 /*
  * Copyright (C) 2012 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:
  * 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 260 matching lines @@
         IsIndexElement,
         HTMLHeadElementProfile,
         OverflowChangedEvent,
         SVGPointMatrixTransform,
         HTMLHtmlElementManifest,
         DOMFocusInOutEvent,
         FileGetLastModifiedDate,
         HTMLElementInnerText,
         HTMLElementOuterText,
         ReplaceDocumentViaJavaScriptURL,
-        ElementSetAttributeNodeNS, // Removed from DOM4.
+        REMOVEDElementSetAttributeNodeNS, // Removed from DOM4.
         ElementPrefixedMatchesSelector,
         DOMImplementationCreateCSSStyleSheet,
         CSSStyleSheetRules,
         CSSStyleSheetAddRule,
         CSSStyleSheetRemoveRule,
         InitMessageEvent,
         PrefixedInitMessageEvent,
         ElementSetPrefix, // Element.prefix is readonly in DOM4.
         CSSStyleDeclarationGetPropertyCSSValue,
         SVGElementGetPresentationAttribute,
@@ skipping 78 matching lines @@
 
     void updateMeasurements();
 
     OwnPtr<BitVector> m_countBits;
     BitVector m_CSSFeatureBits;
 };
 
 } // namespace WebCore
 
 #endif // UseCounter_h