Update PaintLayer size during layout, not after.

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 393 matching lines @@
   // Now remove the leftover anonymous block from the tree, and destroy it.
   // We'll rip it out manually from the tree before destroying it, because we
   // don't want to trigger any tree adjustments with regards to anonymous blocks
   // (or any other kind of undesired chain-reaction).
   Children()->RemoveChildNode(this, child, false);
   child->Destroy();
 }
 
 void LayoutBlock::UpdateAfterLayout() {
   InvalidateStickyConstraints();
-
-  // Update our scroll information if we're overflow:auto/scroll/hidden now that
-  // we know if we overflow or not.
-  if (HasOverflowClip())
-    Layer()->GetScrollableArea()->UpdateAfterLayout();
+  LayoutBox::UpdateAfterLayout();
 }
 
 void LayoutBlock::UpdateLayout() {
   DCHECK(!GetScrollableArea() || GetScrollableArea()->GetScrollAnchor());
 
   LayoutAnalyzer::Scope analyzer(*this);
 
   bool needs_scroll_anchoring =
       HasOverflowClip() && GetScrollableArea()->ShouldPerformScrollAnchoring();
   if (needs_scroll_anchoring)
@@ skipping 254 matching lines @@
     // than the old code that called rightmostPosition and lowestPosition on
     // every relayout so it's not a regression. computeOverflow expects the
     // bottom edge before we clamp our height. Since this information isn't
     // available during simplifiedLayout, we cache the value in m_overflow.
     LayoutUnit old_client_after_edge = HasOverflowModel()
                                            ? overflow_->LayoutClientAfterEdge()
                                            : ClientLogicalBottom();
     ComputeOverflow(old_client_after_edge, true);
   }
 
-  UpdateLayerTransformAfterLayout();
-
   UpdateAfterLayout();
 
   ClearNeedsLayout();
 
   if (LayoutAnalyzer* analyzer = GetFrameView()->GetLayoutAnalyzer())
     analyzer->Increment(LayoutAnalyzer::kLayoutObjectsThatNeedSimplifiedLayout);
 
   return true;
 }
 
@@ skipping 1501 matching lines @@
 bool LayoutBlock::HasDefiniteLogicalHeight() const {
   return AvailableLogicalHeightForPercentageComputation() != LayoutUnit(-1);
 }
 
 bool LayoutBlock::NeedsPreferredWidthsRecalculation() const {
   return (HasRelativeLogicalHeight() && Style()->LogicalWidth().IsAuto()) ||
          LayoutBox::NeedsPreferredWidthsRecalculation();
 }
 
 }  // namespace blink