RTCIceCandidatePairStats.[total/current]RoundTripTime collected.

webrtc/pc/rtcstatscollector.cc

Index: webrtc/pc/rtcstatscollector.cc
diff --git a/webrtc/pc/rtcstatscollector.cc b/webrtc/pc/rtcstatscollector.cc
index 99d7bc1c90b300ab8b34f8f00c36fe79dd942a78..bcee357066d260d239e8618f466627e97c4b2b4b 100644
--- a/webrtc/pc/rtcstatscollector.cc
+++ b/webrtc/pc/rtcstatscollector.cc
@@ -874,11 +874,16 @@ void RTCStatsCollector::ProduceIceCandidateAndPairStats_n(
             static_cast<uint64_t>(info.sent_total_bytes);
         candidate_pair_stats->bytes_received =
             static_cast<uint64_t>(info.recv_total_bytes);
-        // TODO(hbos): The |info.rtt| measurement is smoothed. It shouldn't be
-        // smoothed according to the spec. crbug.com/633550. See
-        // https://w3c.github.io/webrtc-stats/#dom-rtcicecandidatepairstats-currentrtt
-        candidate_pair_stats->current_round_trip_time =
-            static_cast<double>(info.rtt) / rtc::kNumMillisecsPerSec;
+        if (info.total_round_trip_time_ms) {
+          candidate_pair_stats->total_round_trip_time =
+              static_cast<double>(*info.total_round_trip_time_ms) /
+              rtc::kNumMillisecsPerSec;
+        }
+        if (info.current_round_trip_time_ms) {
+          candidate_pair_stats->current_round_trip_time =
+              static_cast<double>(*info.current_round_trip_time_ms) /
+              rtc::kNumMillisecsPerSec;
+        }
         if (info.best_connection && video_media_info &&
             !video_media_info->bw_estimations.empty()) {
           // The bandwidth estimations we have are for the selected candidate