blink: Cleanup class/struct forward declarations

third_party/WebKit/Source/core/layout/BidiRun.h

 /**
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 11 matching lines @@
  */
 
 #ifndef BidiRun_h
 #define BidiRun_h
 
 #include "core/layout/api/LineLayoutItem.h"
 #include "platform/text/BidiResolver.h"
 
 namespace blink {
 
-class BidiContext;
 class InlineBox;
 
 struct BidiRun : BidiCharacterRun {
   BidiRun(bool override,
           unsigned char level,
           int start,
           int stop,
           LineLayoutItem lineLayoutItem,
           WTF::Unicode::CharDirection dir,
           WTF::Unicode::CharDirection overrideDir)
       : BidiCharacterRun(override, level, start, stop, dir, overrideDir),
         m_lineLayoutItem(lineLayoutItem),
         m_box(nullptr) {
     // Stored in base class to save space.
     m_hasHyphen = false;
   }
 
   BidiRun* next() { return static_cast<BidiRun*>(m_next); }
 
  public:
   LineLayoutItem m_lineLayoutItem;
   InlineBox* m_box;
 };
 
 }  // namespace blink
 
 #endif  // BidiRun_h