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diff --git a/third_party/libwebrtc/api/test/metrics/metrics_logger.h b/third_party/libwebrtc/api/test/metrics/metrics_logger.h
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+/*
+ *  Copyright (c) 2022 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 API_TEST_METRICS_METRICS_LOGGER_H_
+#define API_TEST_METRICS_METRICS_LOGGER_H_
+
+#include <map>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "absl/strings/string_view.h"
+#include "api/numerics/samples_stats_counter.h"
+#include "api/test/metrics/metric.h"
+#include "api/test/metrics/metrics_accumulator.h"
+#include "rtc_base/synchronization/mutex.h"
+#include "system_wrappers/include/clock.h"
+
+namespace webrtc {
+namespace test {
+
+// Provides API to log and collect performance metrics.
+class MetricsLogger {
+ public:
+  virtual ~MetricsLogger() = default;
+
+  // Adds a metric with a single value.
+  // `metadata` - metric's level metadata to add.
+  virtual void LogSingleValueMetric(
+      absl::string_view name,
+      absl::string_view test_case_name,
+      double value,
+      Unit unit,
+      ImprovementDirection improvement_direction,
+      std::map<std::string, std::string> metadata = {}) = 0;
+
+  // Adds metrics with a time series created based on the provided `values`.
+  // `metadata` - metric's level metadata to add.
+  virtual void LogMetric(absl::string_view name,
+                         absl::string_view test_case_name,
+                         const SamplesStatsCounter& values,
+                         Unit unit,
+                         ImprovementDirection improvement_direction,
+                         std::map<std::string, std::string> metadata = {}) = 0;
+
+  // Adds metric with a time series with only stats object and without actual
+  // collected values.
+  // `metadata` - metric's level metadata to add.
+  virtual void LogMetric(absl::string_view name,
+                         absl::string_view test_case_name,
+                         const Metric::Stats& metric_stats,
+                         Unit unit,
+                         ImprovementDirection improvement_direction,
+                         std::map<std::string, std::string> metadata = {}) = 0;
+
+  // Returns all metrics collected by this logger.
+  virtual std::vector<Metric> GetCollectedMetrics() const = 0;
+};
+
+class DefaultMetricsLogger : public MetricsLogger {
+ public:
+  explicit DefaultMetricsLogger(webrtc::Clock* clock) : clock_(clock) {}
+  ~DefaultMetricsLogger() override = default;
+
+  void LogSingleValueMetric(
+      absl::string_view name,
+      absl::string_view test_case_name,
+      double value,
+      Unit unit,
+      ImprovementDirection improvement_direction,
+      std::map<std::string, std::string> metadata = {}) override;
+
+  void LogMetric(absl::string_view name,
+                 absl::string_view test_case_name,
+                 const SamplesStatsCounter& values,
+                 Unit unit,
+                 ImprovementDirection improvement_direction,
+                 std::map<std::string, std::string> metadata = {}) override;
+
+  void LogMetric(absl::string_view name,
+                 absl::string_view test_case_name,
+                 const Metric::Stats& metric_stats,
+                 Unit unit,
+                 ImprovementDirection improvement_direction,
+                 std::map<std::string, std::string> metadata = {}) override;
+
+  // Returns all metrics collected by this logger and its `MetricsAccumulator`.
+  std::vector<Metric> GetCollectedMetrics() const override;
+
+  MetricsAccumulator* GetMetricsAccumulator() { return &metrics_accumulator_; }
+
+ private:
+  webrtc::Timestamp Now();
+
+  webrtc::Clock* const clock_;
+  MetricsAccumulator metrics_accumulator_;
+
+  mutable Mutex mutex_;
+  std::vector<Metric> metrics_ RTC_GUARDED_BY(mutex_);
+};
+
+}  // namespace test
+}  // namespace webrtc
+
+#endif  // API_TEST_METRICS_METRICS_LOGGER_H_