SUMMARY element: click() for invisible SUMMARY should toggle DETAILS element.

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 80 matching lines @@
     return true;
   Element* host = element->ownerShadowHost();
   return host && host->isFormControlElement();
 }
 
 bool HTMLSummaryElement::supportsFocus() const {
   return isMainSummary();
 }
 
 void HTMLSummaryElement::defaultEventHandler(Event* event) {
-  if (isMainSummary() && layoutObject()) {
+  if (isMainSummary()) {
     if (event->type() == EventTypeNames::DOMActivate &&
         !isClickableControl(event->target()->toNode())) {
       if (HTMLDetailsElement* details = detailsElement())
         details->toggleOpen();
       event->setDefaultHandled();
       return;
     }
 
     if (event->isKeyboardEvent()) {
       if (event->type() == EventTypeNames::keydown &&
@@ skipping 21 matching lines @@
         event->setDefaultHandled();
         return;
       }
     }
   }
 
   HTMLElement::defaultEventHandler(event);
 }
 
 bool HTMLSummaryElement::willRespondToMouseClickEvents() {
-  if (isMainSummary() && layoutObject())
-    return true;
-
-  return HTMLElement::willRespondToMouseClickEvents();
+  return isMainSummary() || HTMLElement::willRespondToMouseClickEvents();
 }
 
 }  // namespace blink