Treat zero-width collapsed borders as invisible

third_party/WebKit/Source/core/layout/LayoutTableCell.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 Apple Inc.
  *               All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 11 matching lines @@
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "core/layout/LayoutTableCell.h"
 
 #include "core/HTMLNames.h"
 #include "core/css/StylePropertySet.h"
 #include "core/editing/EditingUtilities.h"
 #include "core/html/HTMLTableCellElement.h"
+#include "core/layout/CollapsedBorderValue.h"
 #include "core/layout/LayoutAnalyzer.h"
 #include "core/layout/LayoutTableCol.h"
 #include "core/layout/SubtreeLayoutScope.h"
 #include "core/paint/ObjectPaintInvalidator.h"
 #include "core/paint/PaintLayer.h"
 #include "core/paint/TableCellPainter.h"
-#include "core/style/CollapsedBorderValue.h"
 #include "platform/geometry/FloatQuad.h"
 #include "platform/geometry/TransformState.h"
 #include "platform/wtf/PtrUtil.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 struct SameSizeAsLayoutTableCell : public LayoutBlockFlow {
   unsigned bitfields;
@@ skipping 1433 matching lines @@
 }
 
 bool LayoutTableCell::HasLineIfEmpty() const {
   if (GetNode() && HasEditableStyle(*GetNode()))
     return true;
 
   return LayoutBlock::HasLineIfEmpty();
 }
 
 }  // namespace blink