Added -show_detector_state which show the detector state in the total bitrate graph.

webrtc/rtc_tools/event_log_visualizer/plot_base.cc

 /*
  *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 57 matching lines @@
 }
 
 void Plot::SetTitle(std::string title) {
   title_ = title;
 }
 
 void Plot::AppendTimeSeries(TimeSeries&& time_series) {
   series_list_.emplace_back(std::move(time_series));
 }
 
+void Plot::AppendIntervalSeries(IntervalSeries&& interval_series) {
+  interval_list_.emplace_back(std::move(interval_series));
+}
+
 void Plot::AppendTimeSeriesIfNotEmpty(TimeSeries&& time_series) {
   if (time_series.points.size() > 0) {
     series_list_.emplace_back(std::move(time_series));
   }
 }
 
 }  // namespace plotting
 }  // namespace webrtc