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

webrtc/rtc_base/nethelpers.cc

 /*
  *  Copyright 2008 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 90 matching lines @@
   *addr = addr_;
   for (size_t i = 0; i < addresses_.size(); ++i) {
     if (family == addresses_[i].family()) {
       addr->SetResolvedIP(addresses_[i]);
       return true;
     }
   }
   return false;
 }
 
+int64_t AsyncResolver::GetResolveElapsedTimeMilliseconds() const {
+  return resolve_time_ms_;
+}
+
 int AsyncResolver::GetError() const {
   return error_;
 }
 
 void AsyncResolver::Destroy(bool wait) {
   SignalThread::Destroy(wait);
 }
 
 void AsyncResolver::DoWork() {
+  int64_t start = rtc::TimeMillis();
   error_ = ResolveHostname(addr_.hostname().c_str(), addr_.family(),
                            &addresses_);
+  int64_t stop = rtc::TimeMillis();
+  resolve_time_ms_ = stop - start;
 }
 
 void AsyncResolver::OnWorkDone() {
   SignalDone(this);
 }
 
 const char* inet_ntop(int af, const void *src, char* dst, socklen_t size) {
 #if defined(WEBRTC_WIN)
   return win32_inet_ntop(af, src, dst, size);
 #else
@@ skipping 78 matching lines @@
       break;
     }
   }
   freeifaddrs(ifa);
   return has_ipv6;
 #else
   return true;
 #endif
 }
 }  // namespace rtc