Optimize collapsed border calculation (step 2)

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 167 matching lines @@
 
   LayoutUnit BorderLeft() const override;
   LayoutUnit BorderRight() const override;
   LayoutUnit BorderTop() const override;
   LayoutUnit BorderBottom() const override;
   LayoutUnit BorderStart() const override;
   LayoutUnit BorderEnd() const override;
   LayoutUnit BorderBefore() const override;
   LayoutUnit BorderAfter() const override;
 
+  void InvalidateCollapsedBordersOfAffectedCells();
   void CollectCollapsedBorderValues(LayoutTable::CollapsedBorderValues&);
   static void SortCollapsedBorderValues(LayoutTable::CollapsedBorderValues&);
 
   void UpdateLayout() override;
 
   void Paint(const PaintInfo&, const LayoutPoint&) const override;
 
   int CellBaselinePosition() const;
   bool IsBaselineAligned() const {
     EVerticalAlign va = Style()->VerticalAlign();
@@ skipping 261 matching lines @@
   return ToLayoutTableCell(FirstChild());
 }
 
 inline LayoutTableCell* LayoutTableRow::LastCell() const {
   return ToLayoutTableCell(LastChild());
 }
 
 }  // namespace blink
 
 #endif  // LayoutTableCell_h