Eliminate large chunks of nearly duplicated code for table-row-group border calculation.

Source/core/rendering/RenderTableSection.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 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 156 matching lines @@
     {
         CellStruct& c = m_grid[row].row[col];
         return c.primaryCell();
     }
 
     RenderTableRow* rowRendererAt(unsigned row) const { return m_grid[row].rowRenderer; }
 
     void appendColumn(unsigned pos);
     void splitColumn(unsigned pos, unsigned first);
 
-    int calcOuterBorderBefore() const;
-    int calcOuterBorderAfter() const;
-    int calcOuterBorderStart() const;
-    int calcOuterBorderEnd() const;
+    enum BlockBorderSide { BorderBefore, BorderAfter };
+    int calcBlockDirectionOuterBorder(BlockBorderSide) const;
+    enum InlineBorderSide { BorderStart, BorderEnd };
+    int calcInlineDirectionOuterBorder(InlineBorderSide) const;
     void recalcOuterBorder();
 
     int outerBorderBefore() const { return m_outerBorderBefore; }
     int outerBorderAfter() const { return m_outerBorderAfter; }
     int outerBorderStart() const { return m_outerBorderStart; }
     int outerBorderEnd() const { return m_outerBorderEnd; }
 
     unsigned numRows() const { return m_grid.size(); }
     unsigned numColumns() const;
     void recalcCells();
@@ skipping 115 matching lines @@
     // This map holds the collapsed border values for cells with collapsed borders.
     // It is held at RenderTableSection level to spare memory consumption by table cells.
     HashMap<pair<const RenderTableCell*, int>, CollapsedBorderValue > m_cellsCollapsedBorders;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderTableSection, isTableSection());
 
 } // namespace WebCore
 
 #endif // RenderTableSection_h