Update PaintLayer size during layout, not after.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006, 2008, 2009, 2010 Apple Inc.
  *               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
  * License as published by the Free Software Foundation; either
@@ skipping 118 matching lines @@
 void LayoutEmbeddedObject::UpdateLayout() {
   DCHECK(NeedsLayout());
   LayoutAnalyzer::Scope analyzer(*this);
 
   UpdateLogicalWidth();
   UpdateLogicalHeight();
 
   overflow_.reset();
   AddVisualEffectOverflow();
 
-  UpdateLayerTransformAfterLayout();
+  UpdateAfterLayout();
 
   if (!GetFrameOrPlugin() && GetFrameView())
     GetFrameView()->AddPartToUpdate(*this);
 
   ClearNeedsLayout();
 }
 
 ScrollResult LayoutEmbeddedObject::Scroll(ScrollGranularity granularity,
                                           const FloatSize&) {
   return ScrollResult();
 }
 
 CompositingReasons LayoutEmbeddedObject::AdditionalCompositingReasons() const {
   if (RequiresAcceleratedCompositing())
     return kCompositingReasonPlugin;
   return kCompositingReasonNone;
 }
 
 LayoutReplaced* LayoutEmbeddedObject::EmbeddedReplacedContent() const {
   if (FrameView* frame_view = ChildFrameView())
     return frame_view->EmbeddedReplacedContent();
   return nullptr;
 }
 
 }  // namespace blink