Add MediaGpuChannelManager::LookupChannel().

media/mojo/services/gpu_mojo_media_client.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_SERVICES_GPU_MOJO_MEDIA_CLIENT_H_
 #define MEDIA_MOJO_SERVICES_GPU_MOJO_MEDIA_CLIENT_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 12 matching lines @@
   // is expected to be the GPU main thread task runner.
   GpuMojoMediaClient(
       scoped_refptr<base::SingleThreadTaskRunner> gpu_task_runner,
       base::WeakPtr<MediaGpuChannelManager> media_gpu_channel_manager);
   ~GpuMojoMediaClient() final;
 
   // MojoMediaClient implementation.
   std::unique_ptr<AudioDecoder> CreateAudioDecoder(
       scoped_refptr<base::SingleThreadTaskRunner> task_runner) final;
   std::unique_ptr<VideoDecoder> CreateVideoDecoder(
-      scoped_refptr<base::SingleThreadTaskRunner> task_runner) final;
+      scoped_refptr<base::SingleThreadTaskRunner> task_runner,
+      mojom::CommandBufferIdPtr command_buffer_id) final;
   std::unique_ptr<CdmFactory> CreateCdmFactory(
       service_manager::mojom::InterfaceProvider* interface_provider) final;
 
  private:
   scoped_refptr<base::SingleThreadTaskRunner> gpu_task_runner_;
   base::WeakPtr<MediaGpuChannelManager> media_gpu_channel_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuMojoMediaClient);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_MOJO_SERVICES_GPU_MOJO_MEDIA_CLIENT_H_