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/analyzer.h b/webrtc/tools/event_log_visualizer/analyzer.h
index 4a1a2d6..d2f569c 100644
--- a/webrtc/tools/event_log_visualizer/analyzer.h
+++ b/webrtc/tools/event_log_visualizer/analyzer.h
@@ -73,9 +73,9 @@
 
   void CreateStreamBitrateGraph(PacketDirection desired_direction, Plot* plot);
 
-  void CreateBweGraph(Plot* plot);
+  void CreateBweSimulationGraph(Plot* plot);
 
-  void CreateNetworkDelayFeebackGraph(Plot* plot);
+  void CreateNetworkDelayFeedbackGraph(Plot* plot);
 
  private:
   class StreamId {