Inform the client when the Service Worker rejects an install event

Source/modules/serviceworkers/WaitUntilObserver.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WaitUntilObserver_h
 #define WaitUntilObserver_h
 
 #include "core/dom/ContextLifecycleObserver.h"
 #include "modules/serviceworkers/ServiceWorkerGlobalScopeClient.h"
+#include "public/platform/WebServiceWorkerEventResult.h"
 #include "wtf/Forward.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
 
 class ExecutionContext;
 class ScriptValue;
 
 // Created for each InstallPhaseEvent instance.
 class WaitUntilObserver FINAL :
@@ skipping 17 matching lines @@
 
     WaitUntilObserver(ExecutionContext*, int eventID);
 
     void reportError(const ScriptValue&);
 
     void incrementPendingActivity();
     void decrementPendingActivity();
 
     int m_eventID;
     int m_pendingActivity;
+    blink::WebServiceWorkerEventResult m_result;
 };
 
 } // namespace WebCore
 
 #endif // WaitUntilObserver_h