Automated IWYU fix for TaskRunner includes.

ios/chrome/browser/ntp_snippets/ios_chrome_content_suggestions_service_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/ntp_snippets/ios_chrome_content_suggestions_service_factory.h"
 
 #include "base/feature_list.h"
 #include "base/files/file_path.h"
 #include "base/json/json_reader.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
+#include "base/sequenced_task_runner.h"
 #include "base/task_scheduler/post_task.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/default_clock.h"
 #include "base/values.h"
 #include "components/bookmarks/browser/bookmark_model.h"
 #include "components/image_fetcher/core/image_decoder.h"
 #include "components/image_fetcher/core/image_fetcher.h"
 #include "components/image_fetcher/core/image_fetcher_impl.h"
 #include "components/image_fetcher/ios/ios_image_decoder_impl.h"
@@ skipping 180 matching lines @@
                                                          std::string()));
 
     service->remote_suggestions_scheduler()->SetProvider(provider.get());
     service->set_remote_suggestions_provider(provider.get());
     service->RegisterProvider(std::move(provider));
   }
 
   // TODO(crbug.com/703565): remove std::move() once Xcode 9.0+ is required.
   return std::move(service);
 }