Service Worker: set active worker to REDUNDANT when unregistered

content/browser/service_worker/service_worker_registration.h

 // Copyright 2013 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 CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_H_
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "base/logging.h"
@@ skipping 65 matching lines @@
   // Also notifies listeners via OnVersionAttributesChanged.
   void SetActiveVersion(ServiceWorkerVersion* version);
   void SetWaitingVersion(ServiceWorkerVersion* version);
   void SetInstallingVersion(ServiceWorkerVersion* version);
 
   // If version is the installing, waiting, active version of this
   // registation, the method will reset that field to NULL, and notify
   // listeners via OnVersionAttributesChanged.
   void UnsetVersion(ServiceWorkerVersion* version);
 
-
  private:
   ~ServiceWorkerRegistration();
   friend class base::RefCounted<ServiceWorkerRegistration>;
 
   void SetVersionInternal(
       ServiceWorkerVersion* version,
       scoped_refptr<ServiceWorkerVersion>* data_member,
       int change_flag);
   void UnsetVersionInternal(
       ServiceWorkerVersion* version,
       ChangedVersionAttributesMask* mask);
 
   const GURL pattern_;
   const GURL script_url_;
   const int64 registration_id_;
   scoped_refptr<ServiceWorkerVersion> active_version_;
   scoped_refptr<ServiceWorkerVersion> waiting_version_;
   scoped_refptr<ServiceWorkerVersion> installing_version_;
   ObserverList<Listener> listeners_;
   base::WeakPtr<ServiceWorkerContextCore> context_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerRegistration);
 };
 }  // namespace content
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_H_