stats: add address as alias for ip

this was renamed in https://github.com/w3c/webrtc-pc/issues/1913 and https://github.com/w3c/webrtc-stats/pull/381

Spec: https://w3c.github.io/webrtc-stats/#dom-rtcicecandidatestats-address

BUG=chromium:968203

Change-Id: If75849fe1dc87ada6850e7b64aa8569e13baf0d8
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/212681
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Commit-Queue: Philipp Hancke <philipp.hancke@googlemail.com>
Cr-Commit-Position: refs/heads/master@{#33534}
diff --git a/pc/rtc_stats_collector.cc b/pc/rtc_stats_collector.cc
index 6f5f035..c14f414 100644
--- a/pc/rtc_stats_collector.cc
+++ b/pc/rtc_stats_collector.cc
@@ -652,6 +652,7 @@
       RTC_DCHECK_EQ(rtc::ADAPTER_TYPE_UNKNOWN, candidate.network_type());
     }
     candidate_stats->ip = candidate.address().ipaddr().ToString();
+    candidate_stats->address = candidate.address().ipaddr().ToString();
     candidate_stats->port = static_cast<int32_t>(candidate.address().port());
     candidate_stats->protocol = candidate.protocol();
     candidate_stats->candidate_type =