Refactor the code distributing width to columns in auto layout tables.

Source/core/layout/TableLayoutAlgorithmAuto.h

 /*
  * Copyright (C) 2002 Lars Knoll (knoll@kde.org)
  *           (C) 2002 Dirk Mueller (mueller@kde.org)
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 13 matching lines @@
 #include "core/layout/TableLayoutAlgorithm.h"
 #include "platform/LayoutUnit.h"
 #include "platform/Length.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class LayoutTable;
 class LayoutTableCell;
 
+enum CellsToProcess {
+    AllCells,
+    NonEmptyCells
+};
+
+enum DistributionMode {
+    ExtraWidth,
+    InitialWidth,
+    LeftoverWidth
+};
+
+enum DistributionDirection {
+    StartToEnd,
+    EndToStart
+};
+
 class TableLayoutAlgorithmAuto final : public TableLayoutAlgorithm {
 public:
     TableLayoutAlgorithmAuto(LayoutTable*);
     virtual ~TableLayoutAlgorithmAuto();
 
     virtual void computeIntrinsicLogicalWidths(LayoutUnit& minWidth, LayoutUnit& maxWidth) override;
     virtual void applyPreferredLogicalWidthQuirks(LayoutUnit& minWidth, LayoutUnit& maxWidth) const override;
     virtual void layout() override;
     virtual void willChangeTableLayout() override { }
 
 private:
     void fullRecalc();
     void recalcColumn(unsigned effCol);
 
     int calcEffectiveLogicalWidth();
-    void shrinkCellWidth(const LengthType&, int& available);
+    void shrinkColumnWidth(const LengthType&, int& available);
+    template<typename Total> void distributeWidthToColumns(const LengthType&, int& available, Total, CellsToProcess, DistributionMode, DistributionDirection);

[mstensho (USE GERRIT), 2015/05/12 08:50:27]

I was suggesting that you moved LengthType, CellsToProcess, DistributionMode and
DistributionDirection to the template side as well.

 
     void insertSpanCell(LayoutTableCell*);
 
     struct Layout {
         Layout()
             : minLogicalWidth(0)
             , maxLogicalWidth(0)
             , effectiveMinLogicalWidth(0)
             , effectiveMaxLogicalWidth(0)
             , computedLogicalWidth(0)
@@ skipping 13 matching lines @@
 
     Vector<Layout, 4> m_layoutStruct;
     Vector<LayoutTableCell*, 4> m_spanCells;
     bool m_hasPercent : 1;
     mutable bool m_effectiveLogicalWidthDirty : 1;
 };
 
 } // namespace blink
 
 #endif // TableLayoutAlgorithmAuto