Simplify WebRTC DelayMetrics query in MediaStreamAudioProcessor

content/renderer/media/media_stream_audio_processor_options.h

Index: content/renderer/media/media_stream_audio_processor_options.h
diff --git a/content/renderer/media/media_stream_audio_processor_options.h b/content/renderer/media/media_stream_audio_processor_options.h
index c9c0dcc1c0c78d9fdb2a685a3f446e42f3c8df5f..26007579ac3534bbfd6eb39b5eada581d436af18 100644
--- a/content/renderer/media/media_stream_audio_processor_options.h
+++ b/content/renderer/media/media_stream_audio_processor_options.h
@@ -97,14 +97,9 @@ class CONTENT_EXPORT EchoInformation {
   void UpdateAecDelayStats(webrtc::EchoCancellation* echo_cancellation);
 
  private:
-  // Updates UMA histograms with an interval of 5 seconds.
-  void LogAecDelayStats();
-
-  // Counters to be able to aquire a 5 second aggregated metric out of 1 second
-  // aggregated webrtc::EchoCancellation::GetEchoDelayMetrics() queries.
+  // Counter to track 5 seconds of processed 10 ms chunks in order to query a
+  // new metric from webrtc::EchoCancellation::GetEchoDelayMetrics().
   int num_chunks_;
-  int num_queries_;
-  float echo_fraction_poor_delays_;
 
   DISALLOW_COPY_AND_ASSIGN(EchoInformation);
 };