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diff --git a/third_party/libwebrtc/rtc_base/experiments/rate_control_settings.h b/third_party/libwebrtc/rtc_base/experiments/rate_control_settings.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 RTC_BASE_EXPERIMENTS_RATE_CONTROL_SETTINGS_H_
+#define RTC_BASE_EXPERIMENTS_RATE_CONTROL_SETTINGS_H_
+
+#include "absl/types/optional.h"
+#include "api/field_trials_view.h"
+#include "api/units/data_size.h"
+#include "api/video_codecs/video_codec.h"
+#include "rtc_base/experiments/struct_parameters_parser.h"
+#include "video/config/video_encoder_config.h"
+
+namespace webrtc {
+
+struct CongestionWindowConfig {
+  static constexpr char kKey[] = "WebRTC-CongestionWindow";
+  absl::optional<int> queue_size_ms;
+  absl::optional<int> min_bitrate_bps;
+  absl::optional<DataSize> initial_data_window;
+  bool drop_frame_only = false;
+  std::unique_ptr<StructParametersParser> Parser();
+  static CongestionWindowConfig Parse(absl::string_view config);
+};
+
+struct VideoRateControlConfig {
+  static constexpr char kKey[] = "WebRTC-VideoRateControl";
+  absl::optional<double> pacing_factor;
+  bool alr_probing = false;
+  absl::optional<int> vp8_qp_max;
+  absl::optional<int> vp8_min_pixels;
+  bool trust_vp8 = true;
+  bool trust_vp9 = true;
+  bool bitrate_adjuster = true;
+  bool adjuster_use_headroom = true;
+  bool vp8_s0_boost = false;
+  bool vp8_base_heavy_tl3_alloc = false;
+
+  std::unique_ptr<StructParametersParser> Parser();
+};
+
+class RateControlSettings final {
+ public:
+  ~RateControlSettings();
+  RateControlSettings(RateControlSettings&&);
+
+  static RateControlSettings ParseFromFieldTrials();
+  static RateControlSettings ParseFromKeyValueConfig(
+      const FieldTrialsView* const key_value_config);
+
+  // When CongestionWindowPushback is enabled, the pacer is oblivious to
+  // the congestion window. The relation between outstanding data and
+  // the congestion window affects encoder allocations directly.
+  bool UseCongestionWindow() const;
+  int64_t GetCongestionWindowAdditionalTimeMs() const;
+  bool UseCongestionWindowPushback() const;
+  bool UseCongestionWindowDropFrameOnly() const;
+  uint32_t CongestionWindowMinPushbackTargetBitrateBps() const;
+  absl::optional<DataSize> CongestionWindowInitialDataWindow() const;
+
+  absl::optional<double> GetPacingFactor() const;
+  bool UseAlrProbing() const;
+
+  absl::optional<int> LibvpxVp8QpMax() const;
+  absl::optional<int> LibvpxVp8MinPixels() const;
+  bool LibvpxVp8TrustedRateController() const;
+  bool Vp8BoostBaseLayerQuality() const;
+  bool Vp8DynamicRateSettings() const;
+  bool LibvpxVp9TrustedRateController() const;
+  bool Vp9DynamicRateSettings() const;
+
+  bool Vp8BaseHeavyTl3RateAllocation() const;
+
+  bool UseEncoderBitrateAdjuster() const;
+  bool BitrateAdjusterCanUseNetworkHeadroom() const;
+
+ private:
+  explicit RateControlSettings(const FieldTrialsView* const key_value_config);
+
+  CongestionWindowConfig congestion_window_config_;
+  VideoRateControlConfig video_config_;
+};
+
+}  // namespace webrtc
+
+#endif  // RTC_BASE_EXPERIMENTS_RATE_CONTROL_SETTINGS_H_