Introduce ServiceWorkerHandle for tracking WebServiceWorkerImpl reference

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 22 matching lines @@
 // includes managing which ServiceWorkerVersion is "active" vs "in
 // waiting" (or "pending")
 class CONTENT_EXPORT ServiceWorkerRegistration
     : NON_EXPORTED_BASE(public base::RefCounted<ServiceWorkerRegistration>) {
  public:
   ServiceWorkerRegistration(const GURL& pattern,
                             const GURL& script_url,
                             int64 registration_id,
                             base::WeakPtr<ServiceWorkerContextCore> context);
 
-  void Shutdown();
-  bool is_shutdown() const { return is_shutdown_; }
-
   int64 id() const { return registration_id_; }
   const GURL& script_url() const { return script_url_; }
   const GURL& pattern() const { return pattern_; }
 
   ServiceWorkerVersion* active_version() const {
     DCHECK(!is_shutdown_);
     return active_version_.get();
   }
 
   ServiceWorkerVersion* pending_version() const {
@@ skipping 32 matching lines @@
   scoped_refptr<ServiceWorkerVersion> active_version_;
   scoped_refptr<ServiceWorkerVersion> pending_version_;
 
   bool is_shutdown_;
   base::WeakPtr<ServiceWorkerContextCore> context_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerRegistration);
 };
 }  // namespace content
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_H_