Add ref count to service workers for extension API.

content/browser/service_worker/service_worker_context_wrapper.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_CONTEXT_WRAPPER_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_WRAPPER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 168 matching lines @@
   void UpdateRegistration(const GURL& pattern);
   void SetForceUpdateOnPageLoad(bool force_update_on_page_load);
   void AddObserver(ServiceWorkerContextObserver* observer);
   void RemoveObserver(ServiceWorkerContextObserver* observer);
 
   bool is_incognito() const { return is_incognito_; }
 
   // Must be called from the IO thread.
   bool OriginHasForeignFetchRegistrations(const GURL& origin);
 
+  static void IncrementEmbeddedWorkerRefCount(
+      StoragePartition* storage_partition,
+      int embedded_worker_id);
+  static void DecrementEmbeddedWorkerRefCount(
+      StoragePartition* storage_partition,
+      int embedded_worker_id);
+
  private:
   friend class BackgroundSyncManagerTest;
   friend class base::RefCountedThreadSafe<ServiceWorkerContextWrapper>;
   friend class EmbeddedWorkerTestHelper;
   friend class EmbeddedWorkerBrowserTest;
   friend class ServiceWorkerDispatcherHost;
   friend class ServiceWorkerInternalsUI;
   friend class ServiceWorkerNavigationHandleCore;
   friend class ServiceWorkerProcessManager;
   friend class ServiceWorkerRequestHandler;
   friend class ServiceWorkerVersionBrowserTest;
   friend class MockServiceWorkerContextWrapper;
 
   ~ServiceWorkerContextWrapper() override;
+  void IncrementEmbeddedWorkerRefCountOnIO(int embedded_worker_id);
+  void DecrementEmbeddedWorkerRefCountOnIO(int embedded_worker_id);
 
   void InitInternal(
       const base::FilePath& user_data_directory,
       std::unique_ptr<ServiceWorkerDatabaseTaskManager> database_task_manager,
       const scoped_refptr<base::SingleThreadTaskRunner>& disk_cache_thread,
       storage::QuotaManagerProxy* quota_manager_proxy,
       storage::SpecialStoragePolicy* special_storage_policy);
   void ShutdownOnIO();
 
   void DidFindRegistrationForFindReady(
@@ skipping 39 matching lines @@
   ResourceContext* resource_context_;
 
   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerContextWrapper);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_WRAPPER_H_