Refactoring: move ownership of RtcEventLog from Call to PeerConnection

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 934 matching lines @@
   for (const auto& kv : rtcp_packets_) {
     if (kv.first.GetDirection() == PacketDirection::kIncomingPacket) {
       for (const LoggedRtcpPacket& rtcp_packet : kv.second)
         incoming_rtcp.insert(
             std::make_pair(rtcp_packet.timestamp, &rtcp_packet));
     }
   }
 
   SimulatedClock clock(0);
   BitrateObserver observer;
-  RtcEventLogNullImpl null_event_log;
-  CongestionController cc(&clock, &observer, &observer, &null_event_log);
+  CongestionController cc(&clock, &observer, &observer, nullptr);
   // TODO(holmer): Log the call config and use that here instead.
   static const uint32_t kDefaultStartBitrateBps = 300000;
   cc.SetBweBitrates(0, kDefaultStartBitrateBps, -1);
 
   TimeSeries time_series;
   time_series.label = "Delay-based estimate";
   time_series.style = LINE_DOT_GRAPH;
   TimeSeries acked_time_series;
   acked_time_series.label = "Acked bitrate";
   acked_time_series.style = LINE_DOT_GRAPH;
@@ skipping 170 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