Handle the "key" field as opposed to keyIdentifier field.

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 d1f2f151afd7892ede89b6fbd6040494a8239cd5..6897c92bcce60a723b15bdd9daf3bae310fdd086 100644
--- a/third_party/WebKit/Source/core/html/HTMLSummaryElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLSummaryElement.cpp
@@ -111,7 +111,7 @@ void HTMLSummaryElement::defaultEventHandler(Event* event)
         }
 
         if (event->isKeyboardEvent()) {
-            if (event->type() == EventTypeNames::keydown && toKeyboardEvent(event)->keyIdentifier() == "U+0020") {
+            if (event->type() == EventTypeNames::keydown && toKeyboardEvent(event)->key() == " ") {
                 setActive(true);
                 // No setDefaultHandled() - IE dispatches a keypress in this case.
                 return;
@@ -128,7 +128,7 @@ void HTMLSummaryElement::defaultEventHandler(Event* event)
                     return;
                 }
             }
-            if (event->type() == EventTypeNames::keyup && toKeyboardEvent(event)->keyIdentifier() == "U+0020") {
+            if (event->type() == EventTypeNames::keyup && toKeyboardEvent(event)->key() == " ") {
                 if (active())
                     dispatchSimulatedClick(event);
                 event->setDefaultHandled();