Hooked up RtcEventLog. It lives in Voice Engine and pointers are propagated to ACM and Call.

webrtc/voice_engine/channel.cc

Index: webrtc/voice_engine/channel.cc
diff --git a/webrtc/voice_engine/channel.cc b/webrtc/voice_engine/channel.cc
index 8992425b537b0e32d329a470d58fe50d2619171d..726731db5d3dd6f66ac4c3c1489a483da81d1cc3 100644
--- a/webrtc/voice_engine/channel.cc
+++ b/webrtc/voice_engine/channel.cc
@@ -3454,6 +3454,10 @@ void Channel::DisassociateSendChannel(int channel_id) {
   }
 }
 
+void Channel::SetEventLog(RtcEventLog* event_log) {
+  audio_coding_->SetEventLog(event_log);
+}
+
 int Channel::RegisterExternalMediaProcessing(
     ProcessingTypes type,
     VoEMediaProcess& processObject)