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/agc2/rnn_vad/pitch_info.h

@@ -0,0 +1,29 @@
+/*
+ *  Copyright (c) 2018 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_AGC2_RNN_VAD_PITCH_INFO_H_
+#define MODULES_AUDIO_PROCESSING_AGC2_RNN_VAD_PITCH_INFO_H_
+
+namespace webrtc {
+namespace rnn_vad {
+
+// Stores pitch period and gain information. The pitch gain measures the
+// strength of the pitch (the higher, the stronger).
+struct PitchInfo {
+  PitchInfo() : period(0), gain(0.f) {}
+  PitchInfo(int p, float g) : period(p), gain(g) {}
+  int period;
+  float gain;
+};
+
+}  // namespace rnn_vad
+}  // namespace webrtc
+
+#endif  // MODULES_AUDIO_PROCESSING_AGC2_RNN_VAD_PITCH_INFO_H_