Automated IWYU fix for TaskRunner includes.

media/gpu/ipc/service/media_gpu_channel.cc

 // Copyright 2016 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 "media/gpu/ipc/service/media_gpu_channel.h"
 
+#include "base/single_thread_task_runner.h"
 #include "base/unguessable_token.h"
 #include "gpu/ipc/service/gpu_channel.h"
 #include "ipc/message_filter.h"
 #include "media/gpu/ipc/common/media_messages.h"
 #include "media/gpu/ipc/service/gpu_video_decode_accelerator.h"
 #include "media/gpu/ipc/service/gpu_video_encode_accelerator.h"
 
 namespace media {
 
 namespace {
@@ skipping 164 matching lines @@
                           params.output_profile, params.initial_bitrate);
   GpuCommandBufferMsg_CreateVideoEncoder::WriteReplyParams(reply_message,
                                                            succeeded);
   Send(reply_message);
 
   // encoder is registered as a DestructionObserver of this stub and will
   // self-delete during destruction of this stub.
 }
 
 }  // namespace media