[layoutng] Make sure to update m_isSelfCollapsing after ng layout

third_party/WebKit/Source/core/layout/ng/ng_box.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/layout/ng/ng_box.h"
 
+#include "core/layout/LayoutBlockFlow.h"
 #include "core/layout/ng/layout_ng_block_flow.h"
 #include "core/layout/ng/ng_block_layout_algorithm.h"
 #include "core/layout/ng/ng_constraint_space.h"
 #include "core/layout/ng/ng_direction.h"
 #include "core/layout/ng/ng_fragment.h"
 #include "core/layout/ng/ng_fragment_builder.h"
 #include "core/layout/ng/ng_writing_mode.h"
 
 namespace blink {
 NGBox::NGBox(LayoutObject* layout_object)
@@ skipping 29 matching lines @@
       // Ensure the position of the children are copied across to the
       // LayoutObject tree.
       for (NGBox* box = FirstChild(); box; box = box->NextSibling()) {
         if (box->fragment_)
           box->PositionUpdated();
       }
 
       if (layout_box_->isLayoutBlock())
         toLayoutBlock(layout_box_)->layoutPositionedObjects(true);
       layout_box_->clearNeedsLayout();
+      if (layout_box_->isLayoutBlockFlow()) {
+        toLayoutBlockFlow(layout_box_)->updateIsSelfCollapsing();
+      }
     }
   } else {
     DCHECK(layout_box_);
     // TODO(layout-ng): If fixedSize is true, set the override width/height too
     NGLogicalSize container_size = constraint_space->ContainerSize();
     layout_box_->setOverrideContainingBlockContentLogicalWidth(
         container_size.inline_size);
     layout_box_->setOverrideContainingBlockContentLogicalHeight(
         container_size.block_size);
     if (layout_box_->isLayoutNGBlockFlow() && layout_box_->needsLayout()) {
@@ skipping 62 matching lines @@
 
 bool NGBox::CanUseNewLayout() {
   if (!layout_box_)
     return true;
   if (!layout_box_->isLayoutBlockFlow())
     return false;
   const LayoutBlockFlow* block_flow = toLayoutBlockFlow(layout_box_);
   return !block_flow->childrenInline() || !block_flow->firstChild();
 }
 }  // namespace blink