Automated IWYU fix for TaskRunner includes.

chrome/test/chromedriver/net/url_request_context_getter.cc

 // Copyright (c) 2012 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/net/url_request_context_getter.h"
 
 #include <memory>
 #include <string>
 
 #include "base/memory/ptr_util.h"
+#include "base/single_thread_task_runner.h"
 #include "net/proxy/proxy_config_service_fixed.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_builder.h"
 
 URLRequestContextGetter::URLRequestContextGetter(
     scoped_refptr<base::SingleThreadTaskRunner> network_task_runner)
     : network_task_runner_(network_task_runner) {
 }
 
 net::URLRequestContext* URLRequestContextGetter::GetURLRequestContext() {
@@ skipping 10 matching lines @@
   }
   return url_request_context_.get();
 }
 
 scoped_refptr<base::SingleThreadTaskRunner>
     URLRequestContextGetter::GetNetworkTaskRunner() const {
   return network_task_runner_;
 }
 
 URLRequestContextGetter::~URLRequestContextGetter() {}