blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/html/parser/HTMLScriptRunnerHost.h

 /*
  * Copyright (C) 2010 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 15 matching lines @@
 #ifndef HTMLScriptRunnerHost_h
 #define HTMLScriptRunnerHost_h
 
 #include "core/CoreExport.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 
 class HTMLInputStream;
 class Resource;
-class Visitor;
 
 class CORE_EXPORT HTMLScriptRunnerHost : public GarbageCollectedMixin {
  public:
   virtual ~HTMLScriptRunnerHost() {}
   DEFINE_INLINE_VIRTUAL_TRACE() {}
 
   virtual void notifyScriptLoaded(Resource*) = 0;
   virtual HTMLInputStream& inputStream() = 0;
 
   virtual bool hasPreloadScanner() const = 0;
   virtual void appendCurrentInputStreamToPreloadScannerAndScan() = 0;
 };
 
 }  // namespace blink
 
 #endif