Reduce invalidation on children-needs-layout containers

Source/core/rendering/RenderBox.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 4111 matching lines @@
 {
     ASSERT(!needsLayout());
     // If fragmentation height has changed, we need to lay out. No need to enter the renderer if it
     // is childless, though.
     if (view()->layoutState()->pageLogicalHeightChanged() && slowFirstChild())
         layoutScope.setChildNeedsLayout(this);
 }
 
 void RenderBox::addVisualEffectOverflow()
 {
-    if (!style()->boxShadow() && !style()->hasBorderImageOutsets() && !style()->hasOutline())
+    if (!style()->hasVisualOverflowingEffect())
         return;
 
     LayoutRect borderBox = borderBoxRect();
     LayoutUnit overflowMinX = borderBox.x();
     LayoutUnit overflowMaxX = borderBox.maxX();
     LayoutUnit overflowMinY = borderBox.y();
     LayoutUnit overflowMaxY = borderBox.maxY();
 
     // Compute box-shadow overflow first.
     if (style()->boxShadow()) {
@@ skipping 524 matching lines @@
         return 0;
 
     if (!layoutState && !flowThreadContainingBlock())
         return 0;
 
     RenderBlock* containerBlock = containingBlock();
     return containerBlock->offsetFromLogicalTopOfFirstPage() + logicalTop();
 }
 
 } // namespace WebCore