Deprecating injection of event log into GoogCC factory.

Bug: webrtc:9883
Change-Id: I6087b4a0a2c934e6a9ab435fffaf2eb1fc2a29e4
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/134644
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27824}
diff --git a/rtc_tools/event_log_visualizer/log_simulation.h b/rtc_tools/event_log_visualizer/log_simulation.h
index f891db6..0387e3b 100644
--- a/rtc_tools/event_log_visualizer/log_simulation.h
+++ b/rtc_tools/event_log_visualizer/log_simulation.h
@@ -45,6 +45,7 @@
   void OnFeedback(const LoggedRtcpPacketTransportFeedback& feedback);
   void OnReceiverReport(const LoggedRtcpPacketReceiverReport& report);
   void OnIceConfig(const LoggedIceCandidatePairConfig& candidate);
+  RtcEventLogNullImpl null_event_log_;
 
   const std::function<void(const NetworkControlUpdate&, Timestamp)>
       update_handler_;