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diff --git a/third_party/libwebrtc/modules/video_coding/video_receiver2.h b/third_party/libwebrtc/modules/video_coding/video_receiver2.h
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+/*
+ *  Copyright (c) 2019 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 MODULES_VIDEO_CODING_VIDEO_RECEIVER2_H_
+#define MODULES_VIDEO_CODING_VIDEO_RECEIVER2_H_
+
+#include "api/field_trials_view.h"
+#include "api/sequence_checker.h"
+#include "api/video_codecs/video_decoder.h"
+#include "modules/video_coding/decoder_database.h"
+#include "modules/video_coding/encoded_frame.h"
+#include "modules/video_coding/generic_decoder.h"
+#include "modules/video_coding/timing/timing.h"
+#include "system_wrappers/include/clock.h"
+
+namespace webrtc {
+
+// This class is a copy of vcm::VideoReceiver, trimmed down to what's used by
+// VideoReceive stream, with the aim to incrementally trim it down further and
+// ultimately delete it. It's difficult to do this incrementally with the
+// original VideoReceiver class, since it is used by the legacy
+// VideoCodingModule api.
+class VideoReceiver2 {
+ public:
+  VideoReceiver2(Clock* clock,
+                 VCMTiming* timing,
+                 const FieldTrialsView& field_trials);
+  ~VideoReceiver2();
+
+  void RegisterReceiveCodec(uint8_t payload_type,
+                            const VideoDecoder::Settings& decoder_settings);
+
+  void RegisterExternalDecoder(VideoDecoder* externalDecoder,
+                               uint8_t payloadType);
+  bool IsExternalDecoderRegistered(uint8_t payloadType) const;
+  int32_t RegisterReceiveCallback(VCMReceiveCallback* receiveCallback);
+
+  int32_t Decode(const webrtc::VCMEncodedFrame* frame);
+
+  // Notification methods that are used to check our internal state and validate
+  // threading assumptions. These are called by VideoReceiveStreamInterface.
+  // See `IsDecoderThreadRunning()` for more details.
+  void DecoderThreadStarting();
+  void DecoderThreadStopped();
+
+ private:
+  // Used for DCHECKing thread correctness.
+  // In build where DCHECKs are enabled, will return false before
+  // DecoderThreadStarting is called, then true until DecoderThreadStopped
+  // is called.
+  // In builds where DCHECKs aren't enabled, it will return true.
+  bool IsDecoderThreadRunning();
+
+  SequenceChecker construction_sequence_checker_;
+  SequenceChecker decoder_sequence_checker_;
+  Clock* const clock_;
+  VCMTiming* timing_;
+  VCMDecodedFrameCallback decodedFrameCallback_;
+
+  // Callbacks are set before the decoder thread starts.
+  // Once the decoder thread has been started, usage of `_codecDataBase` moves
+  // over to the decoder thread.
+  VCMDecoderDataBase codecDataBase_;
+
+#if RTC_DCHECK_IS_ON
+  bool decoder_thread_is_running_ = false;
+#endif
+};
+
+}  // namespace webrtc
+
+#endif  // MODULES_VIDEO_CODING_VIDEO_RECEIVER2_H_