Stop using TCP TURN servers as STUN servers.

content/renderer/media/webrtc/peer_connection_dependency_factory.cc

Index: content/renderer/media/webrtc/peer_connection_dependency_factory.cc
diff --git a/content/renderer/media/webrtc/peer_connection_dependency_factory.cc b/content/renderer/media/webrtc/peer_connection_dependency_factory.cc
index 3f6634b1e46c17fa4524df0e45abb6d05fa1fe4c..e295e42c645d355b23519a55b8cdb0c005f6883a 100644
--- a/content/renderer/media/webrtc/peer_connection_dependency_factory.cc
+++ b/content/renderer/media/webrtc/peer_connection_dependency_factory.cc
@@ -147,11 +147,6 @@ class P2PPortAllocatorFactory : public webrtc::PortAllocatorFactoryInterface {
       relay_config.transport_type = turn_configurations[i].transport_type;
       relay_config.secure = turn_configurations[i].secure;
       config.relays.push_back(relay_config);
-
-      // Use turn servers as stun servers.
-      config.stun_servers.insert(rtc::SocketAddress(
-          turn_configurations[i].server.hostname(),
-          turn_configurations[i].server.port()));
     }
     config.enable_multiple_routes = enable_multiple_routes_;