Add the URL attribute to cricket::Candiate.

webrtc/p2p/base/tcpport.cc

Index: webrtc/p2p/base/tcpport.cc
diff --git a/webrtc/p2p/base/tcpport.cc b/webrtc/p2p/base/tcpport.cc
index 11997871f06308e03fba12cdc76e2727c4d310d3..209f569f5c4301ae3edcc754bdfb95255d4b2459 100644
--- a/webrtc/p2p/base/tcpport.cc
+++ b/webrtc/p2p/base/tcpport.cc
@@ -178,7 +178,7 @@ void TCPPort::PrepareAddress() {
       AddAddress(socket_->GetLocalAddress(), socket_->GetLocalAddress(),
                  rtc::SocketAddress(), TCP_PROTOCOL_NAME, "",
                  TCPTYPE_PASSIVE_STR, LOCAL_PORT_TYPE,
-                 ICE_TYPE_PREFERENCE_HOST_TCP, 0, true);
+                 ICE_TYPE_PREFERENCE_HOST_TCP, 0, "", true);
   } else {
     LOG_J(LS_INFO, this) << "Not listening due to firewall restrictions.";
     // Note: We still add the address, since otherwise the remote side won't
@@ -188,7 +188,7 @@ void TCPPort::PrepareAddress() {
     AddAddress(rtc::SocketAddress(ip(), DISCARD_PORT),
                rtc::SocketAddress(ip(), 0), rtc::SocketAddress(),
                TCP_PROTOCOL_NAME, "", TCPTYPE_ACTIVE_STR, LOCAL_PORT_TYPE,
-               ICE_TYPE_PREFERENCE_HOST_TCP, 0, true);
+               ICE_TYPE_PREFERENCE_HOST_TCP, 0, "", true);
   }
 }
 
@@ -300,7 +300,7 @@ void TCPPort::OnAddressReady(rtc::AsyncPacketSocket* socket,
                              const rtc::SocketAddress& address) {
   AddAddress(address, address, rtc::SocketAddress(), TCP_PROTOCOL_NAME, "",
              TCPTYPE_PASSIVE_STR, LOCAL_PORT_TYPE, ICE_TYPE_PREFERENCE_HOST_TCP,
-             0, true);
+             0, "", true);
 }
 
 TCPConnection::TCPConnection(TCPPort* port,