Automated IWYU fix for TaskRunner includes.

media/mojo/clients/mojo_decoder_factory.h

 // 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.
 
 #ifndef MEDIA_MOJO_CLIENTS_MOJO_DECODER_FACTORY_H_
 #define MEDIA_MOJO_CLIENTS_MOJO_DECODER_FACTORY_H_
 
 #include "base/macros.h"
+#include "base/single_thread_task_runner.h"
 #include "media/base/decoder_factory.h"
 #include "services/service_manager/public/interfaces/interface_provider.mojom.h"
 
 namespace media {
 
 class MojoDecoderFactory : public DecoderFactory {
  public:
   explicit MojoDecoderFactory(
       service_manager::mojom::InterfaceProvider* interface_provider);
   ~MojoDecoderFactory() final;
 
   void CreateAudioDecoders(
       scoped_refptr<base::SingleThreadTaskRunner> task_runner,
       std::vector<std::unique_ptr<AudioDecoder>>* audio_decoders) final;
 
   void CreateVideoDecoders(
       scoped_refptr<base::SingleThreadTaskRunner> task_runner,
       GpuVideoAcceleratorFactories* gpu_factories,
       std::vector<std::unique_ptr<VideoDecoder>>* video_decoders) final;
 
  private:
   service_manager::mojom::InterfaceProvider* interface_provider_;
 
   DISALLOW_COPY_AND_ASSIGN(MojoDecoderFactory);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_MOJO_CLIENTS_MOJO_DECODER_FACTORY_H_