Set needsPaintPhaseDescendantBlockBackgrounds if a table has 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)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1402 matching lines @@
         return style()->borderEnd();
 
     return style()->borderStart();
 }
 
 PaintInvalidationReason LayoutTable::invalidatePaintIfNeeded(const PaintInvalidationState& paintInvalidationState)
 {
     // Information of collapsed borders doesn't affect layout and are for painting only.
     // Do it now instead of during painting to invalidate table cells if needed.
     recalcCollapsedBordersIfNeeded();
+    if (collapseBorders() && !m_collapsedBorders.isEmpty())
+        paintInvalidationState.enclosingSelfPaintingLayer(*this).setNeedsPaintPhaseDescendantBlockBackgrounds();
+
     return LayoutBlock::invalidatePaintIfNeeded(paintInvalidationState);
 }
 
 void LayoutTable::invalidatePaintOfSubtreesIfNeeded(const PaintInvalidationState& childPaintInvalidationState)
 {
     // Table cells paint background from the containing column group, column, section and row.
     // If background of any of them changed, we need to invalidate all affected cells.
     // Here use shouldDoFullPaintInvalidation() as a broader condition of background change.
     for (LayoutObject* section = firstChild(); section; section = section->nextSibling()) {
         if (!section->isTableSection())
@@ skipping 47 matching lines @@
 
 LayoutUnit LayoutTable::paddingRight() const
 {
     if (collapseBorders())
         return LayoutUnit();
 
     return LayoutBlock::paddingRight();
 }
 
 } // namespace blink