RTCIceCandidateStats.isRemote added and collected.

This was added to the spec: https://w3c.github.io/webrtc-stats/#dom-rtcicecandidatestats-isremote

BUG=webrtc:6756, chromium:632723, chromium:627816

Review-Url: https://codereview.webrtc.org/2595003003
Cr-Commit-Position: refs/heads/master@{#15863}
diff --git a/webrtc/api/rtcstats_integrationtest.cc b/webrtc/api/rtcstats_integrationtest.cc
index d78ba35..84ea3ab 100644
--- a/webrtc/api/rtcstats_integrationtest.cc
+++ b/webrtc/api/rtcstats_integrationtest.cc
@@ -354,6 +354,7 @@
   bool VerifyRTCIceCandidateStats(
       const RTCIceCandidateStats& candidate) {
     RTCStatsVerifier verifier(report_, &candidate);
+    verifier.TestMemberIsDefined(candidate.is_remote);
     verifier.TestMemberIsDefined(candidate.ip);
     verifier.TestMemberIsDefined(candidate.port);
     verifier.TestMemberIsDefined(candidate.protocol);