Add support for field trials to 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 e67fa768464f06c317d13b8e3ded0d7014653a94..bf973800b459fd21461e3104da4dab68396d1cb3 100644
--- a/webrtc/tools/event_log_visualizer/analyzer.cc
+++ b/webrtc/tools/event_log_visualizer/analyzer.cc
@@ -1157,7 +1157,7 @@ void EventLogAnalyzer::CreateNetworkDelayFeedbackGraph(Plot* plot) {
       if (rtp.header.extension.hasTransportSequenceNumber) {
         RTC_DCHECK(rtp.header.extension.hasTransportSequenceNumber);
         feedback_adapter.AddPacket(rtp.header.extension.transportSequenceNumber,
-                                   rtp.total_length, 0);
+                                   rtp.total_length, PacketInfo::kNotAProbe);
         feedback_adapter.OnSentPacket(
             rtp.header.extension.transportSequenceNumber, rtp.timestamp / 1000);
       }