Clarify some function names in visualization tool.

Review-Url: https://codereview.webrtc.org/2230153003
Cr-Commit-Position: refs/heads/master@{#13754}
diff --git a/webrtc/tools/event_log_visualizer/main.cc b/webrtc/tools/event_log_visualizer/main.cc
index 27dc59c..d8d9e25 100644
--- a/webrtc/tools/event_log_visualizer/main.cc
+++ b/webrtc/tools/event_log_visualizer/main.cc
@@ -149,11 +149,11 @@
   }
 
   if (FLAGS_plot_all || FLAGS_plot_bwe) {
-    analyzer.CreateBweGraph(collection->AppendNewPlot());
+    analyzer.CreateBweSimulationGraph(collection->AppendNewPlot());
   }
 
   if (FLAGS_plot_all || FLAGS_plot_network_delay_feedback) {
-    analyzer.CreateNetworkDelayFeebackGraph(collection->AppendNewPlot());
+    analyzer.CreateNetworkDelayFeedbackGraph(collection->AppendNewPlot());
   }
 
   collection->Draw();