Add MediaGpuChannelManager::LookupChannel().

media/mojo/clients/mojo_video_decoder.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_VIDEO_DECODER_H_
 #define MEDIA_MOJO_CLIENTS_MOJO_VIDEO_DECODER_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "media/base/video_decoder.h"
@@ skipping 43 matching lines @@
                         bool needs_bitstream_conversion,
                         int32_t max_decode_requests);
   void OnDecodeDone(uint64_t decode_id, DecodeStatus status);
   void OnResetDone();
 
   void BindRemoteDecoder();
 
   // Cleans up callbacks and blocks future calls.
   void Stop();
 
+  // Task runner that the decoder runs on (media thread).
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
-  GpuVideoAcceleratorFactories* gpu_factories_;
 
   // Used to pass the remote decoder from the constructor (on the main thread)
   // to Initialize() (on the media thread).
   mojom::VideoDecoderPtrInfo remote_decoder_info_;
 
+  GpuVideoAcceleratorFactories* gpu_factories_ = nullptr;
+
   InitCB init_cb_;
   OutputCB output_cb_;
   uint64_t decode_counter_ = 0;
   std::map<uint64_t, DecodeCB> pending_decodes_;
   base::Closure reset_cb_;
 
   mojom::VideoDecoderPtr remote_decoder_;
   std::unique_ptr<MojoDecoderBufferWriter> mojo_decoder_buffer_writer_;
   bool remote_decoder_bound_ = false;
   bool has_connection_error_ = false;
   mojo::AssociatedBinding<VideoDecoderClient> client_binding_;
 
   bool initialized_ = false;
   bool needs_bitstream_conversion_ = false;
   int32_t max_decode_requests_ = 1;
 
   DISALLOW_COPY_AND_ASSIGN(MojoVideoDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_MOJO_CLIENTS_MOJO_VIDEO_DECODER_H_