Clarify and unify outgoing and incoming packet loss rate plots.

Bug: none
Change-Id: Idefb12f389547c63d8ce1faa10e3796687108222
Reviewed-on: https://webrtc-review.googlesource.com/c/123100
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Commit-Queue: Konrad Hofbauer <hofbauer@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26691}
diff --git a/rtc_tools/event_log_visualizer/analyzer.cc b/rtc_tools/event_log_visualizer/analyzer.cc
index 5c3e006..a77f378 100644
--- a/rtc_tools/event_log_visualizer/analyzer.cc
+++ b/rtc_tools/event_log_visualizer/analyzer.cc
@@ -717,9 +717,8 @@
 
   plot->SetXAxis(config_.CallBeginTimeSec(), config_.CallEndTimeSec(),
                  "Time (s)", kLeftMargin, kRightMargin);
-  plot->SetSuggestedYAxis(0, 1, "Estimated loss rate (%)", kBottomMargin,
-                          kTopMargin);
-  plot->SetTitle("Estimated incoming loss rate");
+  plot->SetSuggestedYAxis(0, 1, "Loss rate (in %)", kBottomMargin, kTopMargin);
+  plot->SetTitle("Incoming packet loss (derived from incoming packets)");
 }
 
 void EventLogAnalyzer::CreateIncomingDelayGraph(Plot* plot) {
@@ -795,9 +794,8 @@
   plot->AppendTimeSeries(std::move(time_series));
   plot->SetXAxis(config_.CallBeginTimeSec(), config_.CallEndTimeSec(),
                  "Time (s)", kLeftMargin, kRightMargin);
-  plot->SetSuggestedYAxis(0, 10, "Percent lost packets", kBottomMargin,
-                          kTopMargin);
-  plot->SetTitle("Reported packet loss");
+  plot->SetSuggestedYAxis(0, 10, "Loss rate (in %)", kBottomMargin, kTopMargin);
+  plot->SetTitle("Outgoing packet loss (as reported by BWE)");
 }
 
 // Plot the total bandwidth used by all RTP streams.