Added metric for the delay in AEC3.

Bug: webrtc:8569
Change-Id: I659049a411654bd3a252ab29008fac467f903efd
Reviewed-on: https://webrtc-review.googlesource.com/25600
Commit-Queue: Per Åhgren <peah@webrtc.org>
Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20892}
diff --git a/modules/audio_processing/audio_processing_impl.cc b/modules/audio_processing/audio_processing_impl.cc
index b5ef42e..d61ab97 100644
--- a/modules/audio_processing/audio_processing_impl.cc
+++ b/modules/audio_processing/audio_processing_impl.cc
@@ -1615,6 +1615,7 @@
       stats.echo_return_loss = ec_metrics.echo_return_loss;
       stats.echo_return_loss_enhancement =
           ec_metrics.echo_return_loss_enhancement;
+      stats.delay_ms = ec_metrics.delay_ms;
     } else if (public_submodules_->echo_cancellation->GetMetrics(&metrics) ==
                Error::kNoError) {
       if (metrics.divergent_filter_fraction != -1.0f) {