Expose the notificationclick and notificationerror events on ServiceWorkerGlobalScope

Source/modules/serviceworkers/WaitUntilObserver.cpp

Index: Source/modules/serviceworkers/WaitUntilObserver.cpp
diff --git a/Source/modules/serviceworkers/WaitUntilObserver.cpp b/Source/modules/serviceworkers/WaitUntilObserver.cpp
index 205e031ac84e3bdb1b242c85974a8a5a27b1a9dc..894f10d89b145b9ceb56941ba299b41c74f51451 100644
--- a/Source/modules/serviceworkers/WaitUntilObserver.cpp
+++ b/Source/modules/serviceworkers/WaitUntilObserver.cpp
@@ -124,6 +124,12 @@ void WaitUntilObserver::decrementPendingActivity()
     case Install:
         client->didHandleInstallEvent(m_eventID, result);
         break;
+    case NotificationClick:
+        client->didHandleNotificationClickEvent(m_eventID, result);
+        break;
+    case NotificationError:
+        client->didHandleNotificationErrorEvent(m_eventID, result);
+        break;
     }
     observeContext(0);
 }