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

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

Index: third_party/WebKit/Source/core/html/HTMLSummaryElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLSummaryElement.cpp b/third_party/WebKit/Source/core/html/HTMLSummaryElement.cpp
index d5c5792c93ace75af5799e522b9a165e5e7c41c4..f789441a0d49868408bc04fe356d7dc52bb14581 100644
--- a/third_party/WebKit/Source/core/html/HTMLSummaryElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLSummaryElement.cpp
@@ -98,7 +98,7 @@ bool HTMLSummaryElement::supportsFocus() const {
 }
 
 void HTMLSummaryElement::defaultEventHandler(Event* event) {
-  if (isMainSummary() && layoutObject()) {
+  if (isMainSummary()) {
     if (event->type() == EventTypeNames::DOMActivate &&
         !isClickableControl(event->target()->toNode())) {
       if (HTMLDetailsElement* details = detailsElement())
@@ -140,10 +140,7 @@ void HTMLSummaryElement::defaultEventHandler(Event* event) {
 }
 
 bool HTMLSummaryElement::willRespondToMouseClickEvents() {
-  if (isMainSummary() && layoutObject())
-    return true;
-
-  return HTMLElement::willRespondToMouseClickEvents();
+  return isMainSummary() || HTMLElement::willRespondToMouseClickEvents();
 }
 
 }  // namespace blink