Moved JsonPrefStore to use SequencedWorkerPool

chrome/browser/browser_process_impl.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/browser_process_impl.h"
 
 #include <algorithm>
 #include <map>
 #include <set>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/alias.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/synchronization/waitable_event.h"
+#include "base/threading/sequenced_worker_pool.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
 #include "chrome/browser/automation/automation_provider_list.h"
 #include "chrome/browser/background/background_mode_manager.h"
 #include "chrome/browser/chrome_browser_main.h"
 #include "chrome/browser/chrome_content_browser_client.h"
 #include "chrome/browser/chrome_plugin_service_filter.h"
 #include "chrome/browser/component_updater/component_updater_configurator.h"
 #include "chrome/browser/component_updater/component_updater_service.h"
 #include "chrome/browser/debugger/remote_debugging_server.h"
@@ skipping 671 matching lines @@
 
   FilePath user_data_dir;
   PathService::Get(chrome::DIR_USER_DATA, &user_data_dir);
   profile_manager_.reset(new ProfileManager(user_data_dir));
 }
 
 void BrowserProcessImpl::CreateLocalState() {
   DCHECK(!created_local_state_ && local_state_.get() == NULL);
   created_local_state_ = true;
 
+  scoped_refptr<base::SequencedTaskRunner> sequenced_task_runner =

[akalin, 2012/10/17 21:58:19]

is there any way we can pass down the task runner from chrome_browser_main
instead?  It'll make it more obvious that they share the same task runner.

[zel, 2012/10/18 00:31:15]

Done.

+      BrowserThread::GetBlockingPool()->
+        GetSequencedTaskRunnerWithShutdownBehavior(
+            BrowserThread::GetBlockingPool()->GetNamedSequenceToken(
+                "local_state_pool"),
+            base::SequencedWorkerPool::BLOCK_SHUTDOWN);
+
   FilePath local_state_path;
   PathService::Get(chrome::FILE_LOCAL_STATE, &local_state_path);
   local_state_.reset(
       PrefService::CreatePrefService(local_state_path, policy_service(), NULL,
-                                     false));
+                                     false, sequenced_task_runner.get()));
 
   // Initialize the prefs of the local state.
   chrome::RegisterLocalState(local_state_.get());
 
   pref_change_registrar_.Init(local_state_.get());
 
   // Initialize the notification for the default browser setting policy.
   local_state_->RegisterBooleanPref(prefs::kDefaultBrowserSettingEnabled,
                                     false);
   pref_change_registrar_.Add(prefs::kDefaultBrowserSettingEnabled, this);
@@ skipping 220 matching lines @@
 }
 
 void BrowserProcessImpl::OnAutoupdateTimer() {
   if (CanAutorestartForUpdate()) {
     DLOG(WARNING) << "Detected update.  Restarting browser.";
     RestartBackgroundInstance();
   }
 }
 
 #endif  // (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)