Change aggregation window of aecDivergentFilterFraction to 1 second.

webrtc/modules/audio_processing/include/audio_processing.h

Index: webrtc/modules/audio_processing/include/audio_processing.h
diff --git a/webrtc/modules/audio_processing/include/audio_processing.h b/webrtc/modules/audio_processing/include/audio_processing.h
index 0c93a984b241817636f980a3d2e1375dd4b40e90..24be9de262247d6fc649ab46fb78f2addfe4574c 100644
--- a/webrtc/modules/audio_processing/include/audio_processing.h
+++ b/webrtc/modules/audio_processing/include/audio_processing.h
@@ -685,7 +685,7 @@ class EchoCancellation {
     // (Pre non-linear processing suppression) A_NLP = 10log_10(P_echo / P_a)
     AudioProcessing::Statistic a_nlp;
 
-    // Fraction of time that the AEC linear filter is divergent, in a 0.5-second
+    // Fraction of time that the AEC linear filter is divergent, in a 1-second
     // non-overlapped aggregation window.
     float divergent_filter_fraction;
   };