Updating APM unittests on the echo metrics.

webrtc/modules/audio_processing/test/unittest.proto

Index: webrtc/modules/audio_processing/test/unittest.proto
diff --git a/webrtc/modules/audio_processing/test/unittest.proto b/webrtc/modules/audio_processing/test/unittest.proto
index ddce46b7756da93046e7c334baf12f39276beb64..3c93bfd71338d9105287dd557fab4eeb4cfc1959 100644
--- a/webrtc/modules/audio_processing/test/unittest.proto
+++ b/webrtc/modules/audio_processing/test/unittest.proto
@@ -32,9 +32,10 @@ message Test {
     optional Statistic echo_return_loss = 2;
     optional Statistic echo_return_loss_enhancement = 3;
     optional Statistic a_nlp = 4;
+    optional float divergent_filter_fraction = 5;
   }
 
-  optional EchoMetrics echo_metrics = 11;
+  repeated EchoMetrics echo_metrics = 11;
 
   message DelayMetrics {
     optional int32 median = 1;
@@ -42,9 +43,9 @@ message Test {
     optional float fraction_poor_delays = 3;
   }
 
-  optional DelayMetrics delay_metrics = 12;
+  repeated DelayMetrics delay_metrics = 12;
 
-  optional int32 rms_level = 13;
+  repeated int32 rms_level = 13;
 
   optional float ns_speech_probability_average = 14;