Automated IWYU fix for TaskRunner includes.

remoting/host/it2me/it2me_native_messaging_host.cc

 // Copyright 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 "remoting/host/it2me/it2me_native_messaging_host.h"
 
 #include <memory>
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/callback_helpers.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
+#include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringize_macros.h"
 #include "base/threading/thread.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "components/policy/policy_constants.h"
 #include "net/base/url_util.h"
 #include "net/socket/client_socket_factory.h"
@@ skipping 554 matching lines @@
 
 bool It2MeNativeMessagingHost::DelegateToElevatedHost(
     std::unique_ptr<base::DictionaryValue> message) {
   NOTREACHED();
   return false;
 }
 
 #endif  // !defined(OS_WIN)
 
 }  // namespace remoting