Invalidate width available to children if style diff needs full layout

third_party/WebKit/Source/core/layout/LayoutBlock.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc.
  *               All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. 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 221 matching lines @@
 
   if (TextAutosizer* textAutosizer = document().textAutosizer())
     textAutosizer->record(this);
 
   propagateStyleToAnonymousChildren();
 
   // It's possible for our border/padding to change, but for the overall logical
   // width or height of the block to end up being the same. We keep track of
   // this change so in layoutBlock, we can know to set relayoutChildren=true.
   m_widthAvailableToChildrenChanged |=
-      oldStyle && diff.needsFullLayout() && needsLayout() &&
-      borderOrPaddingLogicalDimensionChanged(*oldStyle, newStyle, LogicalWidth);
+      oldStyle && needsLayout() &&
+      (diff.needsFullLayout() || borderOrPaddingLogicalDimensionChanged(
+                                     *oldStyle, newStyle, LogicalWidth));
   m_heightAvailableToChildrenChanged |= oldStyle && diff.needsFullLayout() &&
                                         needsLayout() &&
                                         borderOrPaddingLogicalDimensionChanged(
                                             *oldStyle, newStyle, LogicalHeight);
 }
 
 void LayoutBlock::updateFromStyle() {
   LayoutBox::updateFromStyle();
 
   bool shouldClipOverflow =
@@ skipping 1951 matching lines @@
   }
 
   return availableHeight;
 }
 
 bool LayoutBlock::hasDefiniteLogicalHeight() const {
   return availableLogicalHeightForPercentageComputation() != LayoutUnit(-1);
 }
 
 }  // namespace blink