The Service Worker notificationclick event should carry a notification.

Source/web/ServiceWorkerGlobalScopeProxy.cpp

Index: Source/web/ServiceWorkerGlobalScopeProxy.cpp
diff --git a/Source/web/ServiceWorkerGlobalScopeProxy.cpp b/Source/web/ServiceWorkerGlobalScopeProxy.cpp
index d79a23a7523645bb02b7eca215d0d3a5f4444070..82026d900d0a0e04cd6a7a727dbd3512ab03f470 100644
--- a/Source/web/ServiceWorkerGlobalScopeProxy.cpp
+++ b/Source/web/ServiceWorkerGlobalScopeProxy.cpp
@@ -41,6 +41,7 @@
 #include "core/workers/WorkerGlobalScope.h"
 #include "modules/geofencing/CircularGeofencingRegion.h"
 #include "modules/geofencing/GeofencingEvent.h"
+#include "modules/notifications/Notification.h"
 #include "modules/notifications/NotificationEvent.h"
 #include "modules/push_messaging/PushEvent.h"
 #include "modules/push_messaging/PushMessageData.h"
@@ -125,8 +126,8 @@ void ServiceWorkerGlobalScopeProxy::dispatchNotificationClickEvent(int eventID,
 {
     ASSERT(m_workerGlobalScope);
     WaitUntilObserver* observer = WaitUntilObserver::create(m_workerGlobalScope, WaitUntilObserver::NotificationClick, eventID);
-    // FIXME: Initialize a Notification object based on |notificationID| and |data|.
     NotificationEventInit eventInit;
+    eventInit.setNotification(Notification::create(m_workerGlobalScope, notificationID, data));
     RefPtrWillBeRawPtr<Event> event(NotificationEvent::create(EventTypeNames::notificationclick, eventInit, observer));
     m_workerGlobalScope->dispatchExtendableEvent(event.release(), observer);
 }