Update to current webrtc library

This is from the upstream library commit id
3326535126e435f1ba647885ce43a8f0f3d317eb, corresponding to Chromium
88.0.4290.1.

webrtc/modules/audio_processing/aec3/render_delay_controller_metrics.h

@@ -0,0 +1,55 @@
+/*
+ *  Copyright (c) 2017 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_AUDIO_PROCESSING_AEC3_RENDER_DELAY_CONTROLLER_METRICS_H_
+#define MODULES_AUDIO_PROCESSING_AEC3_RENDER_DELAY_CONTROLLER_METRICS_H_
+
+#include <stddef.h>
+
+#include "absl/types/optional.h"
+#include "modules/audio_processing/aec3/clockdrift_detector.h"
+#include "rtc_base/constructor_magic.h"
+
+namespace webrtc {
+
+// Handles the reporting of metrics for the render delay controller.
+class RenderDelayControllerMetrics {
+ public:
+  RenderDelayControllerMetrics();
+
+  // Updates the metric with new data.
+  void Update(absl::optional<size_t> delay_samples,
+              size_t buffer_delay_blocks,
+              absl::optional<int> skew_shift_blocks,
+              ClockdriftDetector::Level clockdrift);
+
+  // Returns true if the metrics have just been reported, otherwise false.
+  bool MetricsReported() { return metrics_reported_; }
+
+ private:
+  // Resets the metrics.
+  void ResetMetrics();
+
+  size_t delay_blocks_ = 0;
+  int reliable_delay_estimate_counter_ = 0;
+  int delay_change_counter_ = 0;
+  int call_counter_ = 0;
+  int skew_report_timer_ = 0;
+  int initial_call_counter_ = 0;
+  bool metrics_reported_ = false;
+  bool initial_update = true;
+  int skew_shift_count_ = 0;
+
+  RTC_DISALLOW_COPY_AND_ASSIGN(RenderDelayControllerMetrics);
+};
+
+}  // namespace webrtc
+
+#endif  // MODULES_AUDIO_PROCESSING_AEC3_RENDER_DELAY_CONTROLLER_METRICS_H_