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diff --git a/third_party/libwebrtc/video/video_stream_decoder2.h b/third_party/libwebrtc/video/video_stream_decoder2.h
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+++ b/third_party/libwebrtc/video/video_stream_decoder2.h
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+/*
+ *  Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef VIDEO_VIDEO_STREAM_DECODER2_H_
+#define VIDEO_VIDEO_STREAM_DECODER2_H_
+
+#include <list>
+#include <map>
+#include <memory>
+#include <vector>
+
+#include "api/scoped_refptr.h"
+#include "api/video/video_sink_interface.h"
+#include "api/video_codecs/video_decoder.h"
+#include "modules/remote_bitrate_estimator/include/remote_bitrate_estimator.h"
+#include "modules/video_coding/include/video_coding_defines.h"
+#include "rtc_base/platform_thread.h"
+
+namespace webrtc {
+
+class VideoReceiver2;
+
+namespace internal {
+
+class ReceiveStatisticsProxy;
+
+class VideoStreamDecoder : public VCMReceiveCallback {
+ public:
+  VideoStreamDecoder(
+      VideoReceiver2* video_receiver,
+      ReceiveStatisticsProxy* receive_statistics_proxy,
+      rtc::VideoSinkInterface<VideoFrame>* incoming_video_stream);
+  ~VideoStreamDecoder() override;
+
+  // Implements VCMReceiveCallback.
+  int32_t FrameToRender(VideoFrame& video_frame,
+                        absl::optional<uint8_t> qp,
+                        TimeDelta decode_time,
+                        VideoContentType content_type) override;
+  void OnDroppedFrames(uint32_t frames_dropped) override;
+  void OnIncomingPayloadType(int payload_type) override;
+  void OnDecoderInfoChanged(
+      const VideoDecoder::DecoderInfo& decoder_info) override;
+
+ private:
+  VideoReceiver2* const video_receiver_;
+  ReceiveStatisticsProxy* const receive_stats_callback_;
+  rtc::VideoSinkInterface<VideoFrame>* const incoming_video_stream_;
+};
+
+}  // namespace internal
+}  // namespace webrtc
+
+#endif  // VIDEO_VIDEO_STREAM_DECODER2_H_