Automated IWYU fix for TaskRunner includes.

ios/chrome/browser/passwords/ios_chrome_password_store_factory.cc

 // Copyright 2015 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 "ios/chrome/browser/passwords/ios_chrome_password_store_factory.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/memory/singleton.h"
+#include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "components/browser_sync/profile_sync_service.h"
 #include "components/keyed_service/core/service_access_type.h"
 #include "components/keyed_service/ios/browser_state_dependency_manager.h"
 #include "components/password_manager/core/browser/affiliated_match_helper.h"
 #include "components/password_manager/core/browser/affiliation_service.h"
 #include "components/password_manager/core/browser/affiliation_utils.h"
 #include "components/password_manager/core/browser/login_database.h"
 #include "components/password_manager/core/browser/password_store_default.h"
 #include "components/password_manager/core/browser/password_store_factory_util.h"
@@ skipping 76 matching lines @@
 }
 
 web::BrowserState* IOSChromePasswordStoreFactory::GetBrowserStateToUse(
     web::BrowserState* context) const {
   return GetBrowserStateRedirectedInIncognito(context);
 }
 
 bool IOSChromePasswordStoreFactory::ServiceIsNULLWhileTesting() const {
   return true;
 }