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diff --git a/third_party/libwebrtc/rtc_base/experiments/encoder_info_settings.h b/third_party/libwebrtc/rtc_base/experiments/encoder_info_settings.h
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+/*
+ *  Copyright 2021 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_ENCODER_INFO_SETTINGS_H_
+#define RTC_BASE_EXPERIMENTS_ENCODER_INFO_SETTINGS_H_
+
+#include <string>
+#include <vector>
+
+#include "absl/strings/string_view.h"
+#include "absl/types/optional.h"
+#include "api/video_codecs/video_encoder.h"
+#include "rtc_base/experiments/field_trial_parser.h"
+
+namespace webrtc {
+
+class EncoderInfoSettings {
+ public:
+  virtual ~EncoderInfoSettings();
+
+  // Bitrate limits per resolution.
+  struct BitrateLimit {
+    int frame_size_pixels = 0;      // The video frame size.
+    int min_start_bitrate_bps = 0;  // The minimum bitrate to start encoding.
+    int min_bitrate_bps = 0;        // The minimum bitrate.
+    int max_bitrate_bps = 0;        // The maximum bitrate.
+  };
+
+  absl::optional<uint32_t> requested_resolution_alignment() const;
+  bool apply_alignment_to_all_simulcast_layers() const {
+    return apply_alignment_to_all_simulcast_layers_.Get();
+  }
+  std::vector<VideoEncoder::ResolutionBitrateLimits> resolution_bitrate_limits()
+      const {
+    return resolution_bitrate_limits_;
+  }
+
+  static std::vector<VideoEncoder::ResolutionBitrateLimits>
+  GetDefaultSinglecastBitrateLimits(VideoCodecType codec_type);
+
+  static absl::optional<VideoEncoder::ResolutionBitrateLimits>
+  GetDefaultSinglecastBitrateLimitsForResolution(VideoCodecType codec_type,
+                                                 int frame_size_pixels);
+
+  static std::vector<VideoEncoder::ResolutionBitrateLimits>
+  GetDefaultSinglecastBitrateLimitsWhenQpIsUntrusted();
+
+  static absl::optional<VideoEncoder::ResolutionBitrateLimits>
+  GetSinglecastBitrateLimitForResolutionWhenQpIsUntrusted(
+      absl::optional<int> frame_size_pixels,
+      const std::vector<VideoEncoder::ResolutionBitrateLimits>&
+          resolution_bitrate_limits);
+
+ protected:
+  explicit EncoderInfoSettings(absl::string_view name);
+
+ private:
+  FieldTrialOptional<uint32_t> requested_resolution_alignment_;
+  FieldTrialFlag apply_alignment_to_all_simulcast_layers_;
+  std::vector<VideoEncoder::ResolutionBitrateLimits> resolution_bitrate_limits_;
+};
+
+// EncoderInfo settings for SimulcastEncoderAdapter.
+class SimulcastEncoderAdapterEncoderInfoSettings : public EncoderInfoSettings {
+ public:
+  SimulcastEncoderAdapterEncoderInfoSettings();
+  ~SimulcastEncoderAdapterEncoderInfoSettings() override {}
+};
+
+// EncoderInfo settings for LibvpxVp8Encoder.
+class LibvpxVp8EncoderInfoSettings : public EncoderInfoSettings {
+ public:
+  LibvpxVp8EncoderInfoSettings();
+  ~LibvpxVp8EncoderInfoSettings() override {}
+};
+
+// EncoderInfo settings for LibvpxVp9Encoder.
+class LibvpxVp9EncoderInfoSettings : public EncoderInfoSettings {
+ public:
+  LibvpxVp9EncoderInfoSettings();
+  ~LibvpxVp9EncoderInfoSettings() override {}
+};
+
+// EncoderInfo settings for LibaomAv1Encoder.
+class LibaomAv1EncoderInfoSettings : public EncoderInfoSettings {
+ public:
+  LibaomAv1EncoderInfoSettings();
+  ~LibaomAv1EncoderInfoSettings() override {}
+};
+
+}  // namespace webrtc
+
+#endif  // RTC_BASE_EXPERIMENTS_ENCODER_INFO_SETTINGS_H_