Service Worker: in Unregister, wait until after the active worker no longer controls a document

content/browser/service_worker/service_worker_unregister_job.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 CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_UNREGISTER_JOB_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_UNREGISTER_JOB_H_
 
 #include <vector>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 30 matching lines @@
   // ServiceWorkerRegisterJobBase implementation:
   virtual void Start() OVERRIDE;
   virtual void Abort() OVERRIDE;
   virtual bool Equals(ServiceWorkerRegisterJobBase* job) OVERRIDE;
   virtual RegistrationJobType GetType() OVERRIDE;
 
  private:
   void OnRegistrationFound(
       ServiceWorkerStatusCode status,
       const scoped_refptr<ServiceWorkerRegistration>& registration);
-  void DeleteRegistration(
-      const scoped_refptr<ServiceWorkerRegistration>& registration);
   void Complete(ServiceWorkerStatusCode status);
   void CompleteInternal(ServiceWorkerStatusCode status);
+  void ResolvePromise(ServiceWorkerStatusCode status);
 
   base::WeakPtr<ServiceWorkerContextCore> context_;
   const GURL pattern_;
   std::vector<UnregistrationCallback> callbacks_;
+  bool is_promise_resolved_;
   base::WeakPtrFactory<ServiceWorkerUnregisterJob> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerUnregisterJob);
 };
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_UNREGISTER_JOB_H_