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

webrtc/voice_engine/voe_codec_impl.cc

Index: webrtc/voice_engine/voe_codec_impl.cc
diff --git a/webrtc/voice_engine/voe_codec_impl.cc b/webrtc/voice_engine/voe_codec_impl.cc
index b8fa5cefaeae460c5673992659fc12646dde2ecc..a4d0b7dd10c29ca9ae4f639050537d2e3370adbb 100644
--- a/webrtc/voice_engine/voe_codec_impl.cc
+++ b/webrtc/voice_engine/voe_codec_impl.cc
@@ -473,6 +473,10 @@ void VoECodecImpl::ExternalToACMCodecRepresentation(CodecInst& toInst,
   }
 }
 
+RtcEventLog* VoECodecImpl::GetEventLog() {
+  return _shared->channel_manager().GetEventLog();
+}
+
 #endif  // WEBRTC_VOICE_ENGINE_CODEC_API
 
 }  // namespace webrtc