[LayoutNG] No need to search for inline children inside a block-children block.

third_party/WebKit/Source/core/layout/ng/ng_block_node.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_block_node.h"
 
 #include "core/layout/LayoutBlockFlow.h"
 #include "core/layout/api/LineLayoutAPIShim.h"
 #include "core/layout/line/InlineIterator.h"
 #include "core/layout/ng/layout_ng_block_flow.h"
@@ skipping 219 matching lines @@
   if (!layout_box_->isLayoutBlockFlow())
     return false;
   if (RuntimeEnabledFeatures::layoutNGInlineEnabled())
     return true;
   if (HasInlineChildren())
     return false;
   return true;
 }
 
 bool NGBlockNode::HasInlineChildren() {
-  if (!layout_box_)
+  if (!layout_box_ || !layout_box_->isLayoutBlockFlow())
     return false;
 
   const LayoutBlockFlow* block_flow = toLayoutBlockFlow(layout_box_);
+  if (!block_flow->childrenInline())
+    return false;
   LayoutObject* child = block_flow->firstChild();
   while (child) {
     if (child->isInline())
       return true;
     child = child->nextSibling();
   }
 
   return false;
 }
 
@@ skipping 61 matching lines @@
       .SetBlockSize(layout_box_->logicalHeight())
       .SetDirection(layout_box_->styleRef().direction())
       .SetWritingMode(
           FromPlatformWritingMode(layout_box_->styleRef().getWritingMode()))
       .SetInlineOverflow(overflow.width())
       .SetBlockOverflow(overflow.height());
   return builder.ToFragment();
 }
 
 }  // namespace blink