Automated IWYU fix for TaskRunner includes.

device/test/test_device_client.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 "device/test/test_device_client.h"
 
+#include "base/single_thread_task_runner.h"
 #include "build/build_config.h"
 
 // This file unconditionally includes these headers despite conditionally
 // depending on the corresponding targets. The code below needs the destructors
 // of the classes defined even when the classes are never instantiated.
 // TODO: This should probably be done more explicitly to avoid ambiguity.
 #include "device/hid/hid_service.h"  // nogncheck
 #include "device/usb/usb_service.h"  // nogncheck
 
 namespace device {
@@ skipping 21 matching lines @@
 UsbService* TestDeviceClient::GetUsbService() {
 #if !defined(OS_ANDROID) && !defined(OS_IOS)
   if (!usb_service_) {
     usb_service_ = UsbService::Create(blocking_task_runner_);
   }
 #endif
   return usb_service_.get();
 }
 
 }  // namespace device