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

third_party/WebKit/Source/core/layout/LayoutTable.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, 2007, 2008, 2009, 2010, 2013 Apple Inc.
  *               All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
@@ skipping 1679 matching lines @@
   RefPtr<ComputedStyle> new_style =
       ComputedStyle::CreateAnonymousStyleWithDisplay(
           parent->StyleRef(),
           parent->IsLayoutInline() ? EDisplay::kInlineTable : EDisplay::kTable);
   LayoutTable* new_table = new LayoutTable(nullptr);
   new_table->SetDocumentForAnonymous(&parent->GetDocument());
   new_table->SetStyle(std::move(new_style));
   return new_table;
 }
 
-const BorderValue& LayoutTable::TableStartBorderAdjoiningCell(
+BorderValue LayoutTable::TableStartBorderAdjoiningCell(
     const LayoutTableCell* cell) const {
 #if DCHECK_IS_ON()
   DCHECK(cell->IsFirstOrLastCellInRow());
 #endif
   if (HasSameDirectionAs(cell->Row()))
     return Style()->BorderStart();
 
   return Style()->BorderEnd();
 }
 
-const BorderValue& LayoutTable::TableEndBorderAdjoiningCell(
+BorderValue LayoutTable::TableEndBorderAdjoiningCell(
     const LayoutTableCell* cell) const {
 #if DCHECK_IS_ON()
   DCHECK(cell->IsFirstOrLastCellInRow());
 #endif
   if (HasSameDirectionAs(cell->Row()))
     return Style()->BorderEnd();
 
   return Style()->BorderStart();
 }
 
@@ skipping 38 matching lines @@
 }
 
 LayoutUnit LayoutTable::PaddingRight() const {
   if (ShouldCollapseBorders())
     return LayoutUnit();
 
   return LayoutBlock::PaddingRight();
 }
 
 }  // namespace blink