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

webrtc/voice_engine/channel.h

Index: webrtc/voice_engine/channel.h
diff --git a/webrtc/voice_engine/channel.h b/webrtc/voice_engine/channel.h
index 398087eefb481a0cd96624b6b086c3d9c0acbe58..6d568c047c70a5064940dee744cdeb05a57627bc 100644
--- a/webrtc/voice_engine/channel.h
+++ b/webrtc/voice_engine/channel.h
@@ -51,6 +51,7 @@ class FileWrapper;
 class ProcessThread;
 class ReceiveStatistics;
 class RemoteNtpTimeEstimator;
+class RtcEventLog;
 class RTPPayloadRegistry;
 class RtpReceiver;
 class RTPReceiverAudio;
@@ -448,6 +449,11 @@ public:
     // Disassociate a send channel if it was associated.
     void DisassociateSendChannel(int channel_id);
 
+    // Sets an RtcEventLog object to enable logging of debug events in the Audio
+    // Coding Module. Calling this function with a nullptr is allowed and will
+    // stop all logging activity.
+    void SetEventLog(RtcEventLog* event_log);

[Henrik Grunell WebRTC, 2015/08/05 09:44:35]

Use a separate function for disabling the logging. It makes it clearer.

[Henrik Grunell WebRTC, 2015/08/07 11:30:03]

Please address this.

[terelius, 2015/08/11 09:04:34]

The main way to stop logging is to call StopLogging in RtcEventLog. Manipulating
the pointer was never intended as the primary method for changing logging
behavior. 

[Henrik Grunell WebRTC, 2015/08/12 12:38:50]

OK, well, the comment says differently. :) We need to decide if it can be
disabled with (if so I prefer a separate disable function + assert in the set
function that it wasn't set before) or not.

[ivoc, 2015/08/12 13:16:41]

The SetEventLog function is removed in the latest version (the pointer is now
propagated through the constructors), so making a StopLogging function here does
not make sense any more in this new design. 

[Henrik Grunell WebRTC, 2015/08/12 15:29:53]

Acknowledged.

+
 protected:
     void OnIncomingFractionLoss(int fraction_lost);