RTCIceCandidateStats.transportId added and collected.

webrtc/api/rtcstats_integrationtest.cc

 /*
  *  Copyright 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 372 matching lines @@
     verifier.TestMemberIsNonNegative<uint64_t>(
         candidate_pair.consent_requests_sent);
     verifier.TestMemberIsUndefined(candidate_pair.consent_responses_received);
     verifier.TestMemberIsUndefined(candidate_pair.consent_responses_sent);
     return verifier.ExpectAllMembersSuccessfullyTested();
   }
 
   bool VerifyRTCIceCandidateStats(
       const RTCIceCandidateStats& candidate) {
     RTCStatsVerifier verifier(report_, &candidate);
+    verifier.TestMemberIsIDReference(
+        candidate.transport_id, RTCTransportStats::kType);
     verifier.TestMemberIsDefined(candidate.is_remote);
     verifier.TestMemberIsDefined(candidate.ip);
     verifier.TestMemberIsNonNegative<int32_t>(candidate.port);
     verifier.TestMemberIsDefined(candidate.protocol);
     verifier.TestMemberIsDefined(candidate.candidate_type);
     verifier.TestMemberIsNonNegative<int32_t>(candidate.priority);
     verifier.TestMemberIsUndefined(candidate.url);
     verifier.TestMemberIsDefined(candidate.deleted);
     return verifier.ExpectAllMembersSuccessfullyTested();
   }
@@ skipping 206 matching lines @@
   caller_ = nullptr;
   // Any pending stats requests should have completed in the act of destroying
   // the peer connection.
   EXPECT_TRUE(stats_obtainer->report());
 }
 #endif  // HAVE_SCTP
 
 }  // namespace
 
 }  // namespace webrtc