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

webrtc/voice_engine/voe_base_impl.cc

Index: webrtc/voice_engine/voe_base_impl.cc
diff --git a/webrtc/voice_engine/voe_base_impl.cc b/webrtc/voice_engine/voe_base_impl.cc
index 7bfaddc744430c38196ad3a27e38638f6e70c1ba..0d3fd0e4ea78bc0873eb679341a35e84b512df66 100644
--- a/webrtc/voice_engine/voe_base_impl.cc
+++ b/webrtc/voice_engine/voe_base_impl.cc
@@ -420,6 +420,7 @@ int VoEBaseImpl::InitializeChannel(voe::ChannelOwner* channel_owner) {
         channel_owner->channel()->ChannelId());
     return -1;
   }
+  channel_owner->channel()->SetEventLog(shared_->event_log());
 
   return channel_owner->channel()->ChannelId();
 }