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diff --git a/third_party/libwebrtc/rtc_base/numerics/sample_stats.h b/third_party/libwebrtc/rtc_base/numerics/sample_stats.h
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+++ b/third_party/libwebrtc/rtc_base/numerics/sample_stats.h
@@ -0,0 +1,77 @@
+/*
+ *  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_NUMERICS_SAMPLE_STATS_H_
+#define RTC_BASE_NUMERICS_SAMPLE_STATS_H_
+
+#include "api/numerics/samples_stats_counter.h"
+#include "api/units/data_rate.h"
+#include "api/units/time_delta.h"
+#include "api/units/timestamp.h"
+
+namespace webrtc {
+template <typename T>
+class SampleStats;
+
+// TODO(srte): Merge this implementation with SamplesStatsCounter.
+template <>
+class SampleStats<double> : public SamplesStatsCounter {
+ public:
+  double Max();
+  double Mean();
+  double Median();
+  double Quantile(double quantile);
+  double Min();
+  double Variance();
+  double StandardDeviation();
+  int Count();
+};
+
+template <>
+class SampleStats<TimeDelta> {
+ public:
+  void AddSample(TimeDelta delta);
+  void AddSampleMs(double delta_ms);
+  void AddSamples(const SampleStats<TimeDelta>& other);
+  bool IsEmpty();
+  TimeDelta Max();
+  TimeDelta Mean();
+  TimeDelta Median();
+  TimeDelta Quantile(double quantile);
+  TimeDelta Min();
+  TimeDelta Variance();
+  TimeDelta StandardDeviation();
+  int Count();
+
+ private:
+  SampleStats<double> stats_;
+};
+
+template <>
+class SampleStats<DataRate> {
+ public:
+  void AddSample(DataRate rate);
+  void AddSampleBps(double rate_bps);
+  void AddSamples(const SampleStats<DataRate>& other);
+  bool IsEmpty();
+  DataRate Max();
+  DataRate Mean();
+  DataRate Median();
+  DataRate Quantile(double quantile);
+  DataRate Min();
+  DataRate Variance();
+  DataRate StandardDeviation();
+  int Count();
+
+ private:
+  SampleStats<double> stats_;
+};
+}  // namespace webrtc
+
+#endif  // RTC_BASE_NUMERICS_SAMPLE_STATS_H_