NetEq: Implement logging of Delayed Packet Outage Events

webrtc/modules/audio_coding/neteq/statistics_calculator.h

Index: webrtc/modules/audio_coding/neteq/statistics_calculator.h
diff --git a/webrtc/modules/audio_coding/neteq/statistics_calculator.h b/webrtc/modules/audio_coding/neteq/statistics_calculator.h
index a2cd9be6edc9db2f2b52f78b6122e75527dd3a7a..513322f882525c712d073c871181a56822778cfb 100644
--- a/webrtc/modules/audio_coding/neteq/statistics_calculator.h
+++ b/webrtc/modules/audio_coding/neteq/statistics_calculator.h
@@ -73,6 +73,11 @@ class StatisticsCalculator {
   // Reports that |num_samples| samples were decoded from secondary packets.
   void SecondaryDecodedSamples(int num_samples);
 
+  // Logs a delayed packet outage event of |outage_duration_ms|. A delayed
+  // packet outage event is defined as an expand period caused not by an actual
+  // packet loss, but by a delayed packet.
+  virtual void LogDelayedPacketOutageEvent(int outage_duration_ms);
+
   // Returns the current network statistics in |stats|. The current sample rate
   // is |fs_hz|, the total number of samples in packet buffer and sync buffer
   // yet to play out is |num_samples_in_buffers|, and the number of samples per