Move border-*-width out of BorderValue and store on SurroundData in ComputedStyle instead

third_party/WebKit/Source/core/layout/LayoutTableCol.cpp

 /*
  * 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.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 149 matching lines @@
   // column is the next column/column-group after its column-group.
   if (!next && Parent()->IsLayoutTableCol())
     next = Parent()->NextSibling();
 
   for (; next && !next->IsLayoutTableCol(); next = next->NextSibling()) {
   }
 
   return ToLayoutTableCol(next);
 }
 
-const BorderValue& LayoutTableCol::BorderAdjoiningCellStartBorder(
+BorderValue LayoutTableCol::BorderAdjoiningCellStartBorder(
     const LayoutTableCell*) const {
   return Style()->BorderStart();
 }
 
-const BorderValue& LayoutTableCol::BorderAdjoiningCellEndBorder(
+BorderValue LayoutTableCol::BorderAdjoiningCellEndBorder(
     const LayoutTableCell*) const {
   return Style()->BorderEnd();
 }
 
-const BorderValue& LayoutTableCol::BorderAdjoiningCellBefore(
+BorderValue LayoutTableCol::BorderAdjoiningCellBefore(
     const LayoutTableCell* cell) const {
   DCHECK_EQ(Table()
                 ->ColElementAtAbsoluteColumn(cell->AbsoluteColumnIndex() +
                                              cell->ColSpan())
                 .InnermostColOrColGroup(),
             this);
   return Style()->BorderStart();
 }
 
-const BorderValue& LayoutTableCol::BorderAdjoiningCellAfter(
+BorderValue LayoutTableCol::BorderAdjoiningCellAfter(
     const LayoutTableCell* cell) const {
   DCHECK_EQ(Table()
                 ->ColElementAtAbsoluteColumn(cell->AbsoluteColumnIndex() - 1)
                 .InnermostColOrColGroup(),
             this);
   return Style()->BorderEnd();
 }
 
 }  // namespace blink