blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/dom/MessagePort.h

 /*
  * Copyright (C) 2008 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 27 matching lines @@
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 #include <memory>
 
 namespace blink {
 
 class ExceptionState;
 class ExecutionContext;
 class MessagePort;
-class ScriptState;
 class SerializedScriptValue;
 
 // Not to be confused with WebMessagePortChannelArray; this one uses Vector and
 // std::unique_ptr instead of WebVector and raw pointers.
 typedef Vector<WebMessagePortChannelUniquePtr, 1> MessagePortChannelArray;
 
 class CORE_EXPORT MessagePort : public EventTargetWithInlineData,
                                 public ActiveScriptWrappable,
                                 public ActiveDOMObject,
                                 public WebMessagePortChannelClient {
@@ skipping 84 matching lines @@
 
   WebMessagePortChannelUniquePtr m_entangledChannel;
 
   bool m_started;
   bool m_closed;
 };
 
 }  // namespace blink
 
 #endif  // MessagePort_h