Convert LayoutState/LayoutStateMaintainer/LayoutStateDisabler to references

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 61 matching lines @@
     InlineFlowBox* firstLineBox() const { return m_lineBoxes.firstLineBox(); }
     InlineFlowBox* lastLineBox() const { return m_lineBoxes.lastLineBox(); }
     InlineBox* firstLineBoxIncludingCulling() const { return alwaysCreateLineBoxes() ? firstLineBox() : culledInlineFirstLineBox(); }
     InlineBox* lastLineBoxIncludingCulling() const { return alwaysCreateLineBoxes() ? lastLineBox() : culledInlineLastLineBox(); }
 
     virtual RenderBoxModelObject* virtualContinuation() const OVERRIDE FINAL { return continuation(); }
     RenderInline* inlineElementContinuation() const;
 
     virtual void updateDragState(bool dragOn) OVERRIDE FINAL;
 
-    LayoutSize offsetForInFlowPositionedInline(const RenderBox* child) const;
+    LayoutSize offsetForInFlowPositionedInline(const RenderBox& child) const;
 
     virtual void addFocusRingRects(Vector<IntRect>&, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer = 0) OVERRIDE FINAL;
     void paintOutline(PaintInfo&, const LayoutPoint&);
 
     using RenderBoxModelObject::continuation;
     using RenderBoxModelObject::setContinuation;
 
     bool alwaysCreateLineBoxes() const { return m_alwaysCreateLineBoxes; }
     void setAlwaysCreateLineBoxes() { m_alwaysCreateLineBoxes = true; }
     void updateAlwaysCreateLineBoxes(bool fullLayout);
@@ skipping 92 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