Automated IWYU fix for TaskRunner includes.

chrome/test/chromedriver/server/http_handler.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/test/chromedriver/server/http_handler.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/logging.h"  // For CHECK macros.
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
+#include "base/single_thread_task_runner.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/sys_info.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "chrome/test/chromedriver/alert_commands.h"
 #include "chrome/test/chromedriver/chrome/adb_impl.h"
@@ skipping 883 matching lines @@
         params.SetString(name, decoded);
     } else if (command_path_parts[i] != path_parts[i]) {
       return false;
     }
   }
   out_params->MergeDictionary(&params);
   return true;
 }
 
 }  // namespace internal