Automated IWYU fix for TaskRunner includes.

gpu/ipc/service/gpu_channel.h

 // 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.
 
 #ifndef GPU_IPC_SERVICE_GPU_CHANNEL_H_
 #define GPU_IPC_SERVICE_GPU_CHANNEL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 
 #include "base/containers/flat_map.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/process/process.h"
+#include "base/single_thread_task_runner.h"
 #include "base/threading/thread_checker.h"
 #include "base/trace_event/memory_dump_provider.h"
 #include "build/build_config.h"
 #include "gpu/command_buffer/service/sync_point_manager.h"
 #include "gpu/gpu_export.h"
 #include "gpu/ipc/service/gpu_command_buffer_stub.h"
 #include "gpu/ipc/service/gpu_memory_manager.h"
 #include "ipc/ipc_sender.h"
 #include "ipc/ipc_sync_channel.h"
 #include "ipc/message_router.h"
@@ skipping 425 matching lines @@
   scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
   scoped_refptr<PreemptionFlag> preempting_flag_;
   scoped_refptr<PreemptionFlag> preempted_flag_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannelMessageQueue);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_IPC_SERVICE_GPU_CHANNEL_H_