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diff --git a/third_party/libwebrtc/modules/remote_bitrate_estimator/overuse_detector.h b/third_party/libwebrtc/modules/remote_bitrate_estimator/overuse_detector.h
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+++ b/third_party/libwebrtc/modules/remote_bitrate_estimator/overuse_detector.h
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+/*
+ *  Copyright (c) 2012 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_REMOTE_BITRATE_ESTIMATOR_OVERUSE_DETECTOR_H_
+#define MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_DETECTOR_H_
+
+#include <stdint.h>
+
+#include "api/network_state_predictor.h"
+
+namespace webrtc {
+
+class OveruseDetector {
+ public:
+  OveruseDetector();
+
+  OveruseDetector(const OveruseDetector&) = delete;
+  OveruseDetector& operator=(const OveruseDetector&) = delete;
+
+  ~OveruseDetector() = default;
+
+  // Update the detection state based on the estimated inter-arrival time delta
+  // offset. `timestamp_delta` is the delta between the last timestamp which the
+  // estimated offset is based on and the last timestamp on which the last
+  // offset was based on, representing the time between detector updates.
+  // `num_of_deltas` is the number of deltas the offset estimate is based on.
+  // Returns the state after the detection update.
+  BandwidthUsage Detect(double offset,
+                        double timestamp_delta,
+                        int num_of_deltas,
+                        int64_t now_ms);
+
+  // Returns the current detector state.
+  BandwidthUsage State() const;
+
+ private:
+  void UpdateThreshold(double modified_offset, int64_t now_ms);
+
+  double threshold_ = 12.5;
+  int64_t last_update_ms_ = -1;
+  double prev_offset_ = 0.0;
+  double time_over_using_ = -1;
+  int overuse_counter_ = 0;
+  BandwidthUsage hypothesis_ = BandwidthUsage::kBwNormal;
+};
+}  // namespace webrtc
+
+#endif  // MODULES_REMOTE_BITRATE_ESTIMATOR_OVERUSE_DETECTOR_H_