Let table row and section's self visual overflow cover whole collapsed borders

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 521 matching lines @@
   // FIXME: We should walk through the items in the tree in tree order to do the
   // layout here instead of walking through individual parts of the tree.
   // crbug.com/442737
   for (auto& caption : captions_)
     caption->LayoutIfNeeded();
 
   for (LayoutTableSection* section = TopSection(); section;
        section = SectionBelow(section)) {
     section->LayoutIfNeeded();
     section->LayoutRows();
-    section->ComputeOverflowFromCells();
+    section->ComputeOverflowFromDescendants();
     section->UpdateAfterLayout();
     section->AddVisualEffectOverflow();
   }
 }
 
 bool LayoutTable::RecalcChildOverflowAfterStyleChange() {
   DCHECK(ChildNeedsOverflowRecalcAfterStyleChange());
   ClearChildNeedsOverflowRecalcAfterStyleChange();
 
   // If the table sections we keep pointers to have gone away then the table
@@ skipping 1207 matching lines @@
 }
 
 LayoutUnit LayoutTable::PaddingRight() const {
   if (ShouldCollapseBorders())
     return LayoutUnit();
 
   return LayoutBlock::PaddingRight();
 }
 
 }  // namespace blink