Factor painting code out of RenderBox into a new class called BoxPainter.

Source/core/rendering/RenderTable.h

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2009, 2010 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
@@ skipping 328 matching lines @@
             if (m_columns[c].span > 1)
                 return true;
         }
         return false;
     }
 
     short m_hSpacing;
     short m_vSpacing;
     int m_borderStart;
     int m_borderEnd;
+
+    BoxPainter m_boxPainter;

[Stephen Chennney, 2014/09/09 16:14:37]

Ditto.

[chrishtr, 2014/09/09 16:55:45]

See above.

 };
 
 inline RenderTableSection* RenderTable::topSection() const
 {
     ASSERT(!needsSectionRecalc());
     if (m_head)
         return m_head;
     if (m_firstBody)
         return m_firstBody;
     return m_foot;
 }
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderTable, isTable());
 
 } // namespace blink
 
 #endif // RenderTable_h