Recalculate intrinsic widths in the old containing block chain when going out of flow.

Source/core/layout/LayoutBox.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 152 matching lines @@
             && (isHTMLHtmlElement(*node()) || isHTMLBodyElement(*node()))) {
             view()->setShouldDoFullPaintInvalidation();
 
             if (oldStyle->hasEntirelyFixedBackground() != newStyle.hasEntirelyFixedBackground())
                 view()->compositor()->setNeedsUpdateFixedBackground();
         }
 
         // When a layout hint happens and an object's position style changes, we have to do a layout
         // to dirty the layout tree using the old position value now.
         if (diff.needsFullLayout() && parent() && oldStyle->position() != newStyle.position()) {
-            markContainerChainForLayout();
+            if (!oldStyle->hasOutOfFlowPosition() && newStyle.hasOutOfFlowPosition()) {
+                // We're about to go out of flow. Before that takes place, we need to mark the
+                // current containing block chain for preferred widths recalculation.
+                setNeedsLayoutAndPrefWidthsRecalc(LayoutInvalidationReason::StyleChange);
+            } else {
+                markContainerChainForLayout();
+            }
             if (oldStyle->position() == StaticPosition)
                 setShouldDoFullPaintInvalidation();
             else if (newStyle.hasOutOfFlowPosition())
                 parent()->setChildNeedsLayout();
             if (isFloating() && !isOutOfFlowPositioned() && newStyle.hasOutOfFlowPosition())
                 removeFloatingOrPositionedChildFromBlockLists();
         }
     // FIXME: This branch runs when !oldStyle, which means that layout was never called
     // so what's the point in invalidating the whole view that we never painted?
     } else if (isBody()) {
@@ skipping 4544 matching lines @@
     StyleImage* borderImage = style()->borderImage().image();
     return borderImage && borderImage->canRender(*this, style()->effectiveZoom()) && borderImage->isLoaded();
 }
 
 ShapeOutsideInfo* LayoutBox::shapeOutsideInfo() const
 {
     return ShapeOutsideInfo::isEnabledFor(*this) ? ShapeOutsideInfo::info(*this) : nullptr;
 }
 
 } // namespace blink