Moved JsonPrefStore to use SequencedWorkerPool

chrome/service/service_process.h

 // Copyright (c) 2012 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 CHROME_SERVICE_SERVICE_PROCESS_H_
 #define CHROME_SERVICE_SERVICE_PROCESS_H_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/threading/sequenced_worker_pool.h"
 #include "base/threading/thread.h"
 #include "base/synchronization/waitable_event.h"
 #include "chrome/service/cloud_print/cloud_print_proxy.h"
 
 class ServiceProcessPrefs;
 class ServiceIPCServer;
 class CommandLine;
 class ServiceURLRequestContextGetter;
 class ServiceProcessState;
 
@@ skipping 93 matching lines @@
   // Called exactly ONCE per process instance for each service that gets
   // disabled in this process (note that shutdown != disabled).
   void OnServiceDisabled();
 
   // Terminate forces the service process to quit.
   void Terminate();
 
   scoped_ptr<net::NetworkChangeNotifier> network_change_notifier_;
   scoped_ptr<base::Thread> io_thread_;
   scoped_ptr<base::Thread> file_thread_;
+  scoped_refptr<base::SequencedWorkerPool> blocking_pool_;
   scoped_ptr<CloudPrintProxy> cloud_print_proxy_;
   scoped_ptr<ServiceProcessPrefs> service_prefs_;
   scoped_ptr<ServiceIPCServer> ipc_server_;
   scoped_ptr<ServiceProcessState> service_process_state_;
 
   // An event that will be signalled when we shutdown.
   base::WaitableEvent shutdown_event_;
 
   // Pointer to the main message loop that host this object.
   MessageLoop* main_message_loop_;
 
   // Count of currently enabled services in this process.
   int enabled_services_;
 
   // Speficies whether a product update is available.
   bool update_available_;
 
   scoped_refptr<ServiceURLRequestContextGetter> request_context_getter_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceProcess);
 };
 
 extern ServiceProcess* g_service_process;
 
 #endif  // CHROME_SERVICE_SERVICE_PROCESS_H_