Revert of Use TaskScheduler instead of blocking pool in automatic_reboot_manager.cc.

chrome/browser/chromeos/system/automatic_reboot_manager.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/system/automatic_reboot_manager.h"
 
 #include <fcntl.h>
 #include <stddef.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <algorithm>
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_file.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/posix/eintr_wrapper.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
-#include "base/task_scheduler/post_task.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/tick_clock.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/common/pref_names.h"
 #include "chromeos/chromeos_paths.h"
 #include "chromeos/chromeos_switches.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
@@ skipping 189 matching lines @@
 void AutomaticRebootManager::UpdateStatusChanged(
     const UpdateEngineClient::Status& status) {
   // Ignore repeated notifications that a reboot is necessary. This is important
   // so that only the time of the first notification is taken into account and
   // repeated notifications do not postpone the reboot request and grace period.
   if (status.status != UpdateEngineClient::UPDATE_STATUS_UPDATED_NEED_REBOOT ||
       !have_boot_time_ || have_update_reboot_needed_time_) {
     return;
   }
 
-  base::PostTaskWithTraits(
-      FROM_HERE,
-      base::TaskTraits()
-          .WithPriority(base::TaskPriority::BACKGROUND)
-          .WithShutdownBehavior(base::TaskShutdownBehavior::BLOCK_SHUTDOWN)
-          .MayBlock(),
-      base::Bind(&SaveUpdateRebootNeededUptime));
+  content::BrowserThread::PostBlockingPoolTask(
+      FROM_HERE, base::Bind(&SaveUpdateRebootNeededUptime));
 
   update_reboot_needed_time_ = clock_->NowTicks();
   have_update_reboot_needed_time_ = true;
 
   Reschedule();
 }
 
 void AutomaticRebootManager::OnUserActivity(const ui::Event* event) {
   if (!login_screen_idle_timer_)
     return;
@@ skipping 161 matching lines @@
   }
 
   login_screen_idle_timer_.reset();
   grace_start_timer_.reset();
   grace_end_timer_.reset();
   DBusThreadManager::Get()->GetPowerManagerClient()->RequestRestart();
 }
 
 }  // namespace system
 }  // namespace chromeos