Add the URL attribute to cricket::Candiate.

webrtc/p2p/base/turnport.h

Index: webrtc/p2p/base/turnport.h
diff --git a/webrtc/p2p/base/turnport.h b/webrtc/p2p/base/turnport.h
index b42145363660cc3a17234d30618d87ee0e27b602..e5f384fa573bc25f803984f34917cf97cb3e2bd2 100644
--- a/webrtc/p2p/base/turnport.h
+++ b/webrtc/p2p/base/turnport.h
@@ -260,6 +260,9 @@ class TurnPort : public Port {
   // pruned (a.k.a. write-timed-out). Returns true if a connection is found.
   bool FailAndPruneConnection(const rtc::SocketAddress& address);
 
+  // Reconstruct the URL of the server which the candidate is gathered from.
+  std::string ReconstructedServerUrl();
+
   ProtocolAddress server_address_;
   TlsCertPolicy tls_cert_policy_ = TlsCertPolicy::TLS_CERT_POLICY_SECURE;
   RelayCredentials credentials_;