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diff --git a/third_party/libwebrtc/modules/video_coding/utility/ivf_file_reader.h b/third_party/libwebrtc/modules/video_coding/utility/ivf_file_reader.h
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+++ b/third_party/libwebrtc/modules/video_coding/utility/ivf_file_reader.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_UTILITY_IVF_FILE_READER_H_
+#define MODULES_VIDEO_CODING_UTILITY_IVF_FILE_READER_H_
+
+#include <memory>
+#include <utility>
+
+#include "absl/types/optional.h"
+#include "api/video/encoded_image.h"
+#include "api/video_codecs/video_codec.h"
+#include "rtc_base/system/file_wrapper.h"
+
+namespace webrtc {
+
+class IvfFileReader {
+ public:
+  // Creates IvfFileReader. Returns nullptr if error acquired.
+  static std::unique_ptr<IvfFileReader> Create(FileWrapper file);
+  ~IvfFileReader();
+
+  IvfFileReader(const IvfFileReader&) = delete;
+  IvfFileReader& operator=(const IvfFileReader&) = delete;
+
+  // Reinitializes reader. Returns false if any error acquired.
+  bool Reset();
+
+  // Returns codec type which was used to create this IVF file and which should
+  // be used to decode EncodedImages from this file.
+  VideoCodecType GetVideoCodecType() const { return codec_type_; }
+  // Returns count of frames in this file.
+  size_t GetFramesCount() const { return num_frames_; }
+
+  // Returns next frame or absl::nullopt if any error acquired. Always returns
+  // absl::nullopt after first error was spotted.
+  absl::optional<EncodedImage> NextFrame();
+  bool HasMoreFrames() const { return num_read_frames_ < num_frames_; }
+  bool HasError() const { return has_error_; }
+
+  uint16_t GetFrameWidth() const { return width_; }
+  uint16_t GetFrameHeight() const { return height_; }
+
+  bool Close();
+
+ private:
+  struct FrameHeader {
+    size_t frame_size;
+    int64_t timestamp;
+  };
+
+  explicit IvfFileReader(FileWrapper file) : file_(std::move(file)) {}
+
+  // Parses codec type from specified position of the buffer. Codec type
+  // contains kCodecTypeBytesCount bytes and caller has to ensure that buffer
+  // won't overflow.
+  absl::optional<VideoCodecType> ParseCodecType(uint8_t* buffer,
+                                                size_t start_pos);
+  absl::optional<FrameHeader> ReadNextFrameHeader();
+
+  VideoCodecType codec_type_;
+  size_t num_frames_;
+  size_t num_read_frames_;
+  uint16_t width_;
+  uint16_t height_;
+  uint32_t time_scale_;
+  FileWrapper file_;
+
+  absl::optional<FrameHeader> next_frame_header_;
+  bool has_error_;
+};
+
+}  // namespace webrtc
+
+#endif  // MODULES_VIDEO_CODING_UTILITY_IVF_FILE_READER_H_