Optimize collapsed border calculation (step 2)

third_party/WebKit/Source/core/layout/LayoutTableRow.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, 2013 Apple Inc.
  *               All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 157 matching lines @@
     return kNoPaintLayer;
   }
 
   void Paint(const PaintInfo&, const LayoutPoint&) const override;
 
   void StyleDidChange(StyleDifference, const ComputedStyle* old_style) override;
 
   void NextSibling() const = delete;
   void PreviousSibling() const = delete;
 
+  void InvalidateCollapsedBordersOfAffectedCells();

[wkorman, 2017/04/27 22:05:36]

Affected by what? Document method, consider rename to either clarify
"AffectedCells" or just remove "OfAffectedCells" since it seems implicit.

+
   // This field should never be read directly. It should be read through
   // rowIndex() above instead. This is to ensure that we never read this
   // value before it is set.
   unsigned row_index_ : 31;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutTableRow, IsTableRow());
 
 inline LayoutTableRow* LayoutTableRow::PreviousRow() const {
   return ToLayoutTableRow(LayoutObject::PreviousSibling());
 }
 
 inline LayoutTableRow* LayoutTableRow::NextRow() const {
   return ToLayoutTableRow(LayoutObject::NextSibling());
 }
 
 inline LayoutTableRow* LayoutTableSection::FirstRow() const {
   return ToLayoutTableRow(FirstChild());
 }
 
 inline LayoutTableRow* LayoutTableSection::LastRow() const {
   return ToLayoutTableRow(LastChild());
 }
 
 }  // namespace blink
 
 #endif  // LayoutTableRow_h