Automated IWYU fix for TaskRunner includes.

media/capture/video/linux/video_capture_device_factory_linux.h

 // Copyright 2014 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.
 
 // Implementation of a VideoCaptureDeviceFactoryLinux class.
 
 #ifndef MEDIA_CAPTURE_VIDEO_LINUX_VIDEO_CAPTURE_DEVICE_FACTORY_LINUX_H_
 #define MEDIA_CAPTURE_VIDEO_LINUX_VIDEO_CAPTURE_DEVICE_FACTORY_LINUX_H_
 
 #include "media/capture/video/video_capture_device_factory.h"
 
 #include "base/macros.h"
+#include "base/single_thread_task_runner.h"
 #include "media/capture/video_capture_types.h"
 
 namespace media {
 
 // Extension of VideoCaptureDeviceFactory to create and manipulate Linux
 // devices.
 class CAPTURE_EXPORT VideoCaptureDeviceFactoryLinux
     : public VideoCaptureDeviceFactory {
  public:
   explicit VideoCaptureDeviceFactoryLinux(
@@ skipping 10 matching lines @@
 
  private:
   std::string GetDeviceModelId(const std::string& device_id);
 
   scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_;
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureDeviceFactoryLinux);
 };
 
 }  // namespace media
 #endif  // MEDIA_CAPTURE_VIDEO_LINUX_VIDEO_CAPTURE_DEVICE_FACTORY_LINUX_H_