blink: Cleanup class/struct forward declarations

third_party/WebKit/Source/core/layout/line/LayoutTextInfo.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc.
  *               All right reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * 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 12 matching lines @@
 
 #ifndef LayoutTextInfo_h
 #define LayoutTextInfo_h
 
 #include "platform/text/TextBreakIterator.h"
 #include "wtf/Allocator.h"
 
 namespace blink {
 
 class Font;
-class LayoutText;
 
 struct LayoutTextInfo {
   STACK_ALLOCATED();
   LayoutTextInfo() : m_text(nullptr), m_font(nullptr) {}
 
   LineLayoutText m_text;
   LazyLineBreakIterator m_lineBreakIterator;
   const Font* m_font;
 };
 
 }  // namespace blink
 
 #endif  // LayoutTextInfo_h