Improved UI for event_log_analyzer tool

- Don't plot every graph by default.
- Change --plot_all to --plot_profile=(all|none|default).
- Some other minor cleanups.

BUG=webrtc:8017

Review-Url: https://codereview.webrtc.org/2983983002
Cr-Commit-Position: refs/heads/master@{#19348}
diff --git a/webrtc/rtc_tools/event_log_visualizer/analyzer.h b/webrtc/rtc_tools/event_log_visualizer/analyzer.h
index ce4868f..328fc53 100644
--- a/webrtc/rtc_tools/event_log_visualizer/analyzer.h
+++ b/webrtc/rtc_tools/event_log_visualizer/analyzer.h
@@ -79,9 +79,8 @@
 
   void CreateIncomingPacketLossGraph(Plot* plot);
 
-  void CreateDelayChangeGraph(Plot* plot);
-
-  void CreateAccumulatedDelayChangeGraph(Plot* plot);
+  void CreateIncomingDelayDeltaGraph(Plot* plot);
+  void CreateIncomingDelayGraph(Plot* plot);
 
   void CreateFractionLossGraph(Plot* plot);
 
@@ -98,7 +97,7 @@
 
   void CreateAudioEncoderTargetBitrateGraph(Plot* plot);
   void CreateAudioEncoderFrameLengthGraph(Plot* plot);
-  void CreateAudioEncoderUplinkPacketLossFractionGraph(Plot* plot);
+  void CreateAudioEncoderPacketLossGraph(Plot* plot);
   void CreateAudioEncoderEnableFecGraph(Plot* plot);
   void CreateAudioEncoderEnableDtxGraph(Plot* plot);
   void CreateAudioEncoderNumChannelsGraph(Plot* plot);