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

webrtc/logging/rtc_event_log/rtc_event_log_parser.h

Index: webrtc/logging/rtc_event_log/rtc_event_log_parser.h
diff --git a/webrtc/logging/rtc_event_log/rtc_event_log_parser.h b/webrtc/logging/rtc_event_log/rtc_event_log_parser.h
index cf2f22e865bd8f657729262aa30983d61c7044fd..f1fcdd7f6eb7b535aea5354ab081ebe0a9f36425 100644
--- a/webrtc/logging/rtc_event_log/rtc_event_log_parser.h
+++ b/webrtc/logging/rtc_event_log/rtc_event_log_parser.h
@@ -75,7 +75,8 @@ class ParsedRtcEventLog {
     AUDIO_SENDER_CONFIG_EVENT = 11,
     AUDIO_NETWORK_ADAPTATION_EVENT = 16,
     BWE_PROBE_CLUSTER_CREATED_EVENT = 17,
-    BWE_PROBE_RESULT_EVENT = 18
+    BWE_PROBE_RESULT_EVENT = 18,
+    HOST_LOOKUP_EVENT = 19
   };
 
   enum class MediaType { ANY, AUDIO, VIDEO, DATA };
@@ -174,6 +175,10 @@ class ParsedRtcEventLog {
 
   MediaType GetMediaType(uint32_t ssrc, PacketDirection direction) const;
 
+  // Reads info from a HostLookupResult.
+  void GetHostLookup(size_t index,
+                     int* error, int64_t* host_lookup_time_ms) const;
+
  private:
   rtclog::StreamConfig GetVideoReceiveConfig(const rtclog::Event& event) const;
   std::vector<rtclog::StreamConfig> GetVideoSendConfig(