[css-flexbox] Have to call updateBlockChildDirtyBitsBeforeLayout before layoutIfNeeded

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

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 862 matching lines @@
         return std::max(LayoutUnit(), computeMainAxisExtentForChild(child, MainOrPreferredSize, flexBasis));
 
     if (child.styleRef().containsSize())
         return LayoutUnit();
 
     LayoutUnit mainAxisExtent;
     if (childFlexBaseSizeRequiresLayout(child)) {
         if (childLayoutType == NeverLayout)
             return LayoutUnit();
 
+        updateBlockChildDirtyBitsBeforeLayout(childLayoutType == ForceLayout, child);
         if (child.needsLayout() || childLayoutType == ForceLayout || !m_intrinsicSizeAlongMainAxis.contains(&child)) {
             child.forceChildLayout();
             cacheChildMainSize(child);
         }
         mainAxisExtent = m_intrinsicSizeAlongMainAxis.get(&child);
     } else {
         // We don't need to add scrollbarLogicalWidth here. For overflow: scroll, the preferred width
         // already includes the scrollbar size (via scrollbarLogicalWidth()). For overflow: auto,
         // childFlexBaseSizeRequiresLayout returns true and we handle that via the other branch
         // of this if.
@@ skipping 1063 matching lines @@
             DCHECK(child);
             LayoutUnit lineCrossAxisExtent = lineContexts[lineNumber].crossAxisExtent;
             LayoutUnit originalOffset = lineContexts[lineNumber].crossAxisOffset - crossAxisStartEdge;
             LayoutUnit newOffset = contentExtent - originalOffset - lineCrossAxisExtent;
             adjustAlignmentForChild(*child, newOffset - originalOffset);
         }
     }
 }
 
 } // namespace blink