Fix delay plot crash in event_log_visualizer.

webrtc/tools/event_log_visualizer/analyzer.cc

Index: webrtc/tools/event_log_visualizer/analyzer.cc
diff --git a/webrtc/tools/event_log_visualizer/analyzer.cc b/webrtc/tools/event_log_visualizer/analyzer.cc
index d1dec22f0a1c2d0bd5462687ec6c51691f9fd537..1cb27c9e5ef5c6a9386065cf02a6394cc7fdeaa1 100644
--- a/webrtc/tools/event_log_visualizer/analyzer.cc
+++ b/webrtc/tools/event_log_visualizer/analyzer.cc
@@ -1104,6 +1104,7 @@ void EventLogAnalyzer::CreateNetworkDelayFeedbackGraph(Plot* plot) {
   SimulatedClock clock(0);
   NullBitrateController null_controller;
   TransportFeedbackAdapter feedback_adapter(&clock, &null_controller);
+  feedback_adapter.InitBwe();
 
   TimeSeries time_series;
   time_series.label = "Network Delay Change";