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diff --git a/third_party/libwebrtc/test/testsupport/ivf_video_frame_generator.h b/third_party/libwebrtc/test/testsupport/ivf_video_frame_generator.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 TEST_TESTSUPPORT_IVF_VIDEO_FRAME_GENERATOR_H_
+#define TEST_TESTSUPPORT_IVF_VIDEO_FRAME_GENERATOR_H_
+
+#include <memory>
+#include <string>
+
+#include "absl/types/optional.h"
+#include "api/sequence_checker.h"
+#include "api/test/frame_generator_interface.h"
+#include "api/video/video_codec_type.h"
+#include "api/video/video_frame.h"
+#include "api/video_codecs/video_decoder.h"
+#include "modules/video_coding/utility/ivf_file_reader.h"
+#include "rtc_base/event.h"
+#include "rtc_base/synchronization/mutex.h"
+
+namespace webrtc {
+namespace test {
+
+// All methods except constructor must be used from the same thread.
+class IvfVideoFrameGenerator : public FrameGeneratorInterface {
+ public:
+  explicit IvfVideoFrameGenerator(const std::string& file_name);
+  ~IvfVideoFrameGenerator() override;
+
+  VideoFrameData NextFrame() override;
+  void ChangeResolution(size_t width, size_t height) override;
+
+ private:
+  class DecodedCallback : public DecodedImageCallback {
+   public:
+    explicit DecodedCallback(IvfVideoFrameGenerator* reader)
+        : reader_(reader) {}
+
+    int32_t Decoded(VideoFrame& decoded_image) override;
+    int32_t Decoded(VideoFrame& decoded_image, int64_t decode_time_ms) override;
+    void Decoded(VideoFrame& decoded_image,
+                 absl::optional<int32_t> decode_time_ms,
+                 absl::optional<uint8_t> qp) override;
+
+   private:
+    IvfVideoFrameGenerator* const reader_;
+  };
+
+  void OnFrameDecoded(const VideoFrame& decoded_frame);
+  static std::unique_ptr<VideoDecoder> CreateVideoDecoder(
+      VideoCodecType codec_type);
+
+  DecodedCallback callback_;
+  std::unique_ptr<IvfFileReader> file_reader_;
+  std::unique_ptr<VideoDecoder> video_decoder_;
+
+  size_t width_;
+  size_t height_;
+
+  // This lock is used to ensure that all API method will be called
+  // sequentially. It is required because we need to ensure that generator
+  // won't be destroyed while it is reading the next frame on another thread,
+  // because it will cause SIGSEGV when decoder callback will be invoked.
+  //
+  // FrameGenerator is injected into PeerConnection via some scoped_ref object
+  // and it can happen that the last pointer will be destroyed on the different
+  // thread comparing to the one from which frames were read.
+  Mutex lock_;
+  // This lock is used to sync between sending and receiving frame from decoder.
+  // We can't reuse `lock_` because then generator can be destroyed between
+  // frame was sent to decoder and decoder callback was invoked.
+  Mutex frame_decode_lock_;
+
+  rtc::Event next_frame_decoded_;
+  absl::optional<VideoFrame> next_frame_ RTC_GUARDED_BY(frame_decode_lock_);
+};
+
+}  // namespace test
+}  // namespace webrtc
+
+#endif  // TEST_TESTSUPPORT_IVF_VIDEO_FRAME_GENERATOR_H_