IceServer's uri is no longer set, switching to using urls.

Bug: 875213
Change-Id: Ida2e195ae818724a72012fb2f0907ef09adbde10
Reviewed-on: https://chromium-review.googlesource.com/1180366Reviewed-by: Henrik Boström <hbos@chromium.org>
Commit-Queue: Hoi Pipeloi <jeroendb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584758}

content/renderer/media/webrtc/peer_connection_tracker.cc

@@ -48,10 +48,16 @@ static const char* SerializeBoolean(bool value) {
 static std::string SerializeServers(
     const std::vector<webrtc::PeerConnectionInterface::IceServer>& servers) {
   std::string result = "[";
-  for (size_t i = 0; i < servers.size(); ++i) {
-    result += servers[i].uri;
-    if (i != servers.size() - 1)
-      result += ", ";
+  bool following = false;
+  for (const auto& server : servers) {
+    for (const auto& url : server.urls) {
+      if (following)
+        result += ", ";
+      else
+        following = true;
+
+      result += url;
+    }
   }
   result += "]";
   return result;