Rename "Audio playout level" to "Audio level" on the Y-axis of the event log graph.

webrtc/tools/event_log_visualizer/analyzer.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 627 matching lines @@
     }
   }
 
   for (auto& series : time_series) {
     series.second.label = GetStreamName(series.first);
     series.second.style = LINE_GRAPH;
     plot->series_list_.push_back(std::move(series.second));
   }
 
   plot->SetXAxis(0, call_duration_s_, "Time (s)", kLeftMargin, kRightMargin);
-  plot->SetYAxis(-127, 0, "Audio playout level (dBov)", kBottomMargin,
+  plot->SetYAxis(-127, 0, "Audio level (dBov)", kBottomMargin,
                  kTopMargin);
   plot->SetTitle("Audio level");
 }
 
 // For each SSRC, plot the time between the consecutive playouts.
 void EventLogAnalyzer::CreateSequenceNumberGraph(Plot* plot) {
   for (auto& kv : rtp_packets_) {
     StreamId stream_id = kv.first;
     const std::vector<LoggedRtpPacket>& packet_stream = kv.second;
     // Filter on direction and SSRC.
@@ skipping 496 matching lines @@
     point.y -= estimated_base_delay_ms;
   // Add the data set to the plot.
   plot->series_list_.push_back(std::move(time_series));
 
   plot->SetXAxis(0, call_duration_s_, "Time (s)", kLeftMargin, kRightMargin);
   plot->SetSuggestedYAxis(0, 10, "Delay (ms)", kBottomMargin, kTopMargin);
   plot->SetTitle("Network Delay Change.");
 }
 }  // namespace plotting
 }  // namespace webrtc