Reduce forward declarations in core/rendering

Source/core/rendering/RenderInline.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 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.
  *
@@ skipping 12 matching lines @@
 #ifndef RenderInline_h
 #define RenderInline_h
 
 #include "core/animation/ActiveAnimations.h"
 #include "core/rendering/InlineFlowBox.h"
 #include "core/rendering/RenderBoxModelObject.h"
 #include "core/rendering/RenderLineBoxList.h"
 
 namespace WebCore {
 
-class Position;
-
 class RenderInline : public RenderBoxModelObject {
 public:
     explicit RenderInline(Element*);
 
     static RenderInline* createAnonymous(Document*);
 
     RenderObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); }
     RenderObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); }
 
     // If you have a RenderInline, use firstChild or lastChild instead.
@@ skipping 145 matching lines @@
     RenderLineBoxList m_lineBoxes;   // All of the line boxes created for this inline flow.  For example, <i>Hello<br>world.</i> will have two <i> line boxes.
 
     bool m_alwaysCreateLineBoxes : 1;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderInline, isRenderInline());
 
 } // namespace WebCore
 
 #endif // RenderInline_h