Moved JsonPrefStore to use SequencedWorkerPool

chrome/browser/browser_process_impl.cc

Index: chrome/browser/browser_process_impl.cc
diff --git a/chrome/browser/browser_process_impl.cc b/chrome/browser/browser_process_impl.cc
index 2b33a94337a8886c4ff5f15ef947fec631bea4b2..9e251db0948d86da447839660085edc72f5c6302 100644
--- a/chrome/browser/browser_process_impl.cc
+++ b/chrome/browser/browser_process_impl.cc
@@ -16,6 +16,7 @@
 #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"
@@ -131,7 +132,9 @@ using content::ChildProcessSecurityPolicy;
 using content::PluginService;
 using content::ResourceDispatcherHost;
 
-BrowserProcessImpl::BrowserProcessImpl(const CommandLine& command_line)
+BrowserProcessImpl::BrowserProcessImpl(
+    base::SequencedTaskRunner* local_state_task_runner,
+    const CommandLine& command_line)
     : created_metrics_service_(false),
       created_watchdog_thread_(false),
       created_browser_policy_connector_(false),
@@ -145,7 +148,8 @@ BrowserProcessImpl::BrowserProcessImpl(const CommandLine& command_line)
       checked_for_new_frames_(false),
       using_new_frames_(false),
       render_widget_snapshot_taker_(new RenderWidgetSnapshotTaker),
-      download_status_updater_(new DownloadStatusUpdater) {
+      download_status_updater_(new DownloadStatusUpdater),
+      local_state_task_runner_(local_state_task_runner) {
   g_browser_process = this;
 
 #if defined(ENABLE_PRINTING)
@@ -715,7 +719,7 @@ void BrowserProcessImpl::CreateLocalState() {
   PathService::Get(chrome::FILE_LOCAL_STATE, &local_state_path);
   local_state_.reset(
       PrefService::CreatePrefService(local_state_path, policy_service(), NULL,
-                                     false));
+                                     false, local_state_task_runner_));
 
   // Initialize the prefs of the local state.
   chrome::RegisterLocalState(local_state_.get());