Automated IWYU fix for TaskRunner includes.

chromecast/browser/pref_service_helper.cc

 // Copyright 2014 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 "chromecast/browser/pref_service_helper.h"
 
 #include <string>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/path_service.h"
+#include "base/sequenced_task_runner.h"
 #include "chromecast/base/cast_paths.h"
 #include "chromecast/base/pref_names.h"
 #include "components/prefs/json_pref_store.h"
 #include "components/prefs/pref_registry_simple.h"
 #include "components/prefs/pref_service_factory.h"
 #include "components/prefs/pref_store.h"
 #include "content/public/browser/browser_thread.h"
 
 namespace chromecast {
 namespace shell {
@@ skipping 53 matching lines @@
                << config_path.value()
                << ", pref_error=" << prefs_read_error;
   }
 
   OnPrefsLoaded(pref_service.get());
   return pref_service;
 }
 
 }  // namespace shell
 }  // namespace chromecast