blink: Cleanup class/struct forward declarations

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

 /*
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009, 2010, 2011 Apple 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 15 matching lines @@
 #include "core/layout/api/LineLayoutBoxModel.h"
 #include "core/layout/api/LineLayoutItem.h"
 #include "core/layout/api/SelectionState.h"
 #include "platform/graphics/paint/DisplayItemClient.h"
 #include "platform/text/TextDirection.h"
 
 namespace blink {
 
 class HitTestRequest;
 class HitTestResult;
+class InlineFlowBox;
 class LayoutObject;
 class RootInlineBox;
 
 enum MarkLineBoxes { MarkLineBoxesDirty, DontMarkLineBoxes };
 
 // InlineBox represents a rectangle that occurs on a line.  It corresponds to
 // some LayoutObject (i.e., it represents a portion of that LayoutObject).
 class CORE_EXPORT InlineBox : public DisplayItemClient {
   WTF_MAKE_NONCOPYABLE(InlineBox);
 
@@ skipping 523 matching lines @@
 
 }  // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const blink::InlineBox*);
 void showLineTree(const blink::InlineBox*);
 #endif
 
 #endif  // InlineBox_h