Clean up forward declarations in Source/core/html

Source/core/html/parser/XSSAuditor.h

 /*
  * Copyright (C) 2011 Adam Barth. 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 18 matching lines @@
 #include "core/html/parser/HTMLToken.h"
 #include "platform/network/HTTPParsers.h"
 #include "platform/text/SuffixTree.h"
 #include "platform/weborigin/KURL.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/text/TextEncoding.h"
 
 namespace blink {
 
 class Document;
-class HTMLDocumentParser;
 class HTMLSourceTracker;
 class XSSInfo;
 class XSSAuditorDelegate;
 
 struct FilterTokenRequest {
     FilterTokenRequest(HTMLToken& token, HTMLSourceTracker& sourceTracker, bool shouldAllowCDATA)
         : token(token)
         , sourceTracker(sourceTracker)
         , shouldAllowCDATA(shouldAllowCDATA)
     { }
@@ skipping 74 matching lines @@
 
     State m_state;
     bool m_scriptTagFoundInRequest;
     unsigned m_scriptTagNestingLevel;
     WTF::TextEncoding m_encoding;
 };
 
 }
 
 #endif