Remove internalSubset from DocumentType

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 118 matching lines @@
         DemotedFormElement = 85,
         CaptureAttributeAsEnum = 86,
         SVGAnimationElement = 90,
         KeyboardEventKeyLocation = 91,
         LineClamp = 96,
         SubFrameBeforeUnloadRegistered = 97,
         SubFrameBeforeUnloadFired = 98,
         TextReplaceWholeText = 100,
         ConsoleMarkTimeline = 102,
         CSSPseudoElementUserAgentCustomPseudo = 103,
-        DocumentTypeInternalSubset = 105, // Removed from DOM4.
         ElementGetAttributeNode = 107, // Removed from DOM4.
         ElementSetAttributeNode = 108, // Removed from DOM4.
         ElementRemoveAttributeNode = 109, // Removed from DOM4.
         ElementGetAttributeNodeNS = 110, // Removed from DOM4.
         DocumentCreateAttribute = 111, // Removed from DOM4.
         DocumentCreateAttributeNS = 112, // Removed from DOM4.
         DocumentCreateCDATASection = 113, // Removed from DOM4.
         DocumentInputEncoding = 114, // Removed from DOM4.
         DocumentXMLEncoding = 115, // Removed from DOM4.
         DocumentXMLStandalone = 116, // Removed from DOM4.
@@ skipping 328 matching lines @@
 
     void updateMeasurements();
 
     OwnPtr<BitVector> m_countBits;
     BitVector m_CSSFeatureBits;
 };
 
 } // namespace WebCore
 
 #endif // UseCounter_h