Add logging of host lookups made by TurnPort to the RtcEventLog.

webrtc/voice_engine/channel.cc

 /*
  *  Copyright (c) 2012 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 168 matching lines @@
   };
 
   void LogProbeResultFailure(int id,
                              ProbeFailureReason failure_reason) override {
     rtc::CritScope lock(&crit_);
     if (event_log_) {
       event_log_->LogProbeResultFailure(id, failure_reason);
     }
   };
 
+  void LogHostLookupResult(int error,
+                           int64_t elapsed_time_in_milliseconds) override {
+    RTC_NOTREACHED();

[terelius, 2017/08/18 11:41:33]

The rest of the code has forwarded the call, regardless of whether the function
is expected to be called via the voice engine or not. On the other hand, it
makes sense to catch unexpected calls. One of the owners need to decide what the
policy should be here.

+  }
+
   void SetEventLog(RtcEventLog* event_log) {
     rtc::CritScope lock(&crit_);
     event_log_ = event_log;
   }
 
  private:
   rtc::CriticalSection crit_;
   RtcEventLog* event_log_ GUARDED_BY(crit_);
   RTC_DISALLOW_COPY_AND_ASSIGN(RtcEventLogProxy);
 };
@@ skipping 2966 matching lines @@
   int64_t min_rtt = 0;
   if (_rtpRtcpModule->RTT(remoteSSRC, &rtt, &avg_rtt, &min_rtt, &max_rtt) !=
       0) {
     return 0;
   }
   return rtt;
 }
 
 }  // namespace voe
 }  // namespace webrtc