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

webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.h

Index: webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.h
diff --git a/webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.h b/webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.h
index 19ca01bf9ed43c8442bbbb76c845922cc8d0c6b2..1a0073a18f9b57ab8ddbc60e09f808db74444ada 100644
--- a/webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.h
+++ b/webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.h
@@ -235,6 +235,8 @@ class AudioCodingModuleImpl : public AudioCodingModule {
 
   void DisableNack() override;
 
+  void SetEventLog(RtcEventLog* event_log) override;
+
   std::vector<uint16_t> GetNackList(int64_t round_trip_time_ms) const override;
 
   void GetDecodingCallStatistics(AudioDecodingCallStats* stats) const override;
@@ -328,6 +330,9 @@ class AudioCodingModuleImpl : public AudioCodingModule {
   AudioPacketizationCallback* packetization_callback_
       GUARDED_BY(callback_crit_sect_);
   ACMVADCallback* vad_callback_ GUARDED_BY(callback_crit_sect_);
+
+  CriticalSectionWrapper* event_log_crit_sect_;
+  RtcEventLog* event_log_ GUARDED_BY(event_log_crit_sect_);

[hlundin-webrtc, 2015/08/05 08:32:13]

Perhaps name it event_log_ptr_crit_sect_ to clarify that it is the pointer that
is protected, not the pointee.

[ivoc, 2015/08/05 09:12:41]

Done.

 };
 
 }  // namespace acm2