[Cleanup] Migrate the StatisticsProvider to use the TaskScheduler

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

 // Copyright (c) 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.
 
 #include "chrome/browser/chromeos/chrome_browser_main_chromeos.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <utility>
@@ skipping 602 matching lines @@
       std::unique_ptr<quirks::QuirksManager::Delegate>(
           new quirks::QuirksManagerDelegateImpl()),
       content::BrowserThread::GetBlockingPool(),
       g_browser_process->local_state(),
       g_browser_process->system_request_context());
 
   // Start loading machine statistics here. StatisticsProvider::Shutdown()
   // will ensure that loading is aborted on early exit.
   bool load_oem_statistics = !StartupUtils::IsOobeCompleted();
   system::StatisticsProvider::GetInstance()->StartLoadingMachineStatistics(
-      content::BrowserThread::GetTaskRunnerForThread(
-          content::BrowserThread::FILE),
       load_oem_statistics);
 
   base::FilePath downloads_directory;
   CHECK(PathService::Get(chrome::DIR_DEFAULT_DOWNLOADS, &downloads_directory));
 
   DeviceOAuth2TokenServiceFactory::Initialize();
 
   wake_on_wifi_manager_.reset(new WakeOnWifiManager());
   network_throttling_observer_.reset(
       new NetworkThrottlingObserver(g_browser_process->local_state()));
@@ skipping 510 matching lines @@
   // outlive CertLoader.
   system_token_certdb_initializer_.reset();
 
   ChromeBrowserMainPartsLinux::PostDestroyThreads();
 
   // Destroy DeviceSettingsService after g_browser_process.
   DeviceSettingsService::Shutdown();
 }
 
 }  //  namespace chromeos