Moved JsonPrefStore to use SequencedWorkerPool

chrome/browser/chrome_browser_main.cc

 // 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.
 
 #include "chrome/browser/chrome_browser_main.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
 #include "base/at_exit.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/path_service.h"
 #include "base/process_info.h"
 #include "base/process_util.h"
 #include "base/run_loop.h"
 #include "base/string_number_conversions.h"
 #include "base/string_piece.h"
 #include "base/string_split.h"
 #include "base/sys_string_conversions.h"
 #include "base/threading/platform_thread.h"
+#include "base/threading/sequenced_worker_pool.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "chrome/browser/about_flags.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_process_impl.h"
 #include "chrome/browser/browser_shutdown.h"
 #include "chrome/browser/chrome_browser_main_extra_parts.h"
 #include "chrome/browser/chrome_gpu_util.h"
@@ skipping 265 matching lines @@
     // becomes our default language in the prefs.
     // Other platforms obey the system locale.
     std::wstring install_lang;
     if (GoogleUpdateSettings::GetLanguage(&install_lang)) {
       local_state->SetString(prefs::kApplicationLocale,
                              WideToASCII(install_lang));
     }
 #endif  // defined(OS_WIN)
   }
 
+  scoped_refptr<base::SequencedTaskRunner> sequenced_task_runner =
+      BrowserThread::GetBlockingPool()->
+        GetSequencedTaskRunnerWithShutdownBehavior(
+            BrowserThread::GetBlockingPool()->GetNamedSequenceToken(
+                "local_state_pool"),
+            base::SequencedWorkerPool::BLOCK_SHUTDOWN);
+
   // If the local state file for the current profile doesn't exist and the
   // parent profile command line flag is present, then we should inherit some
   // local state from the parent profile.
   // Checking that the local state file for the current profile doesn't exist
   // is the most robust way to determine whether we need to inherit or not
   // since the parent profile command line flag can be present even when the
   // current profile is not a new one, and in that case we do not want to
   // inherit and reset the user's setting.
   if (!local_state_file_exists &&
       parsed_command_line.HasSwitch(switches::kParentProfile)) {
     FilePath parent_profile =
         parsed_command_line.GetSwitchValuePath(switches::kParentProfile);
     scoped_ptr<PrefService> parent_local_state(
         PrefService::CreatePrefService(parent_profile,
                                        g_browser_process->policy_service(),
-                                       NULL, false));
+                                       NULL, false, sequenced_task_runner));
     parent_local_state->RegisterStringPref(prefs::kApplicationLocale,
                                            std::string());
     // Right now, we only inherit the locale setting from the parent profile.
     local_state->SetString(
         prefs::kApplicationLocale,
         parent_local_state->GetString(prefs::kApplicationLocale));
   }
 
 #if defined(OS_CHROMEOS)
   if (parsed_command_line.HasSwitch(switches::kLoginManager)) {
@@ skipping 1302 matching lines @@
     if (base::win::GetVersion() <= base::win::VERSION_XP)
       uma_name += "_XP";
 
     uma_name += "_PreRead_";
     uma_name += pre_read_percentage;
     AddPreReadHistogramTime(uma_name.c_str(), time);
   }
 #endif
 #endif
 }