Clean up forward declarations in Source/core/html

Source/core/html/parser/HTMLTreeBuilder.h

 /*
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  * Copyright (C) 2011 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
@@ skipping 24 matching lines @@
 #include "wtf/PassOwnPtr.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 #include "wtf/text/StringBuilder.h"
 #include "wtf/text/TextPosition.h"
 
 namespace blink {
 
 class AtomicHTMLToken;
-class Document;
 class DocumentFragment;
 class Element;
-class LocalFrame;
-class HTMLToken;
 class HTMLDocument;
-class Node;
 class HTMLDocumentParser;
 
 class HTMLTreeBuilder FINAL : public NoBaseWillBeGarbageCollectedFinalized<HTMLTreeBuilder> {
     WTF_MAKE_NONCOPYABLE(HTMLTreeBuilder); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
 public:
     static PassOwnPtrWillBeRawPtr<HTMLTreeBuilder> create(HTMLDocumentParser* parser, HTMLDocument* document, ParserContentPolicy parserContentPolicy, bool reportErrors, const HTMLParserOptions& options)
     {
         return adoptPtrWillBeNoop(new HTMLTreeBuilder(parser, document, parserContentPolicy, reportErrors, options));
     }
     static PassOwnPtrWillBeRawPtr<HTMLTreeBuilder> create(HTMLDocumentParser* parser, DocumentFragment* fragment, Element* contextElement, ParserContentPolicy parserContentPolicy, const HTMLParserOptions& options)
@@ skipping 178 matching lines @@
 
     RefPtrWillBeMember<Element> m_scriptToProcess; // <script> tag which needs processing before resuming the parser.
     TextPosition m_scriptToProcessStartPosition; // Starting line number of the script tag needing processing.
 
     HTMLParserOptions m_options;
 };
 
 }
 
 #endif