Refactor LayoutTableCell::Has(Start|End)BorderAdjoinjingTable() and add test

third_party/WebKit/Source/core/layout/LayoutTableCell.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, 2007, 2009, 2013 Apple Inc.
  *               All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 331 matching lines @@
  protected:
   void StyleDidChange(StyleDifference, const ComputedStyle* old_style) override;
   void ComputePreferredLogicalWidths() override;
 
   void AddLayerHitTestRects(LayerHitTestRects&,
                             const PaintLayer* current_composited_layer,
                             const LayoutPoint& layer_offset,
                             const LayoutRect& container_rect) const override;
 
  private:
+  friend class LayoutTableCellTest;
+
   bool IsOfType(LayoutObjectType type) const override {
     return type == kLayoutObjectTableCell || LayoutBlockFlow::IsOfType(type);
   }
 
   void WillBeRemovedFromTree() override;
 
   void UpdateLogicalWidth() override;
 
   void PaintBoxDecorationBackground(const PaintInfo&,
                                     const LayoutPoint&) const override;
@@ skipping 12 matching lines @@
   LayoutUnit BorderHalfBefore(bool outer) const;
   LayoutUnit BorderHalfAfter(bool outer) const;
 
   void SetIntrinsicPaddingBefore(int p) { intrinsic_padding_before_ = p; }
   void SetIntrinsicPaddingAfter(int p) { intrinsic_padding_after_ = p; }
   void SetIntrinsicPadding(int before, int after) {
     SetIntrinsicPaddingBefore(before);
     SetIntrinsicPaddingAfter(after);
   }
 
+  inline bool IsInStartColumn() const;
+  inline bool IsInEndColumn() const;
   bool HasStartBorderAdjoiningTable() const;
   bool HasEndBorderAdjoiningTable() const;
 
   // Those functions implement the CSS collapsing border conflict
   // resolution algorithm.
   // http://www.w3.org/TR/CSS2/tables.html#border-conflict-resolution
   //
   // The code is pretty complicated as it needs to handle mixed directionality
   // between the table and the different table parts (cell, row, row group,
   // column, column group).
@@ skipping 60 matching lines @@
   return ToLayoutTableCell(FirstChild());
 }
 
 inline LayoutTableCell* LayoutTableRow::LastCell() const {
   return ToLayoutTableCell(LastChild());
 }
 
 }  // namespace blink
 
 #endif  // LayoutTableCell_h