Support display:flex for 'summary'

third_party/WebKit/Source/core/html/HTMLSummaryElement.cpp

 /*
  * Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 26 matching lines @@
 
 HTMLSummaryElement* HTMLSummaryElement::create(Document& document) {
   HTMLSummaryElement* summary = new HTMLSummaryElement(document);
   summary->ensureUserAgentShadowRoot();
   return summary;
 }
 
 HTMLSummaryElement::HTMLSummaryElement(Document& document)
     : HTMLElement(summaryTag, document) {}
 
-LayoutObject* HTMLSummaryElement::createLayoutObject(const ComputedStyle&) {
+LayoutObject* HTMLSummaryElement::createLayoutObject(
+    const ComputedStyle& style) {
+  EDisplay display = style.display();
+  if (display == EDisplay::Flex || display == EDisplay::InlineFlex ||
+      display == EDisplay::Grid || display == EDisplay::InlineGrid)
+    return LayoutObject::createObject(this, style);
   return new LayoutBlockFlow(this);
 }
 
 void HTMLSummaryElement::didAddUserAgentShadowRoot(ShadowRoot& root) {
   DetailsMarkerControl* markerControl =
       DetailsMarkerControl::create(document());
   markerControl->setIdAttribute(ShadowElementNames::detailsMarker());
   root.appendChild(markerControl);
   root.appendChild(HTMLContentElement::create(document()));
 }
@@ skipping 77 matching lines @@
 }
 
 bool HTMLSummaryElement::willRespondToMouseClickEvents() {
   if (isMainSummary() && layoutObject())
     return true;
 
   return HTMLElement::willRespondToMouseClickEvents();
 }
 
 }  // namespace blink