Add DISABLE_TCP_TRANSPORT flag in the Transport API.

webkit/glue/p2p_transport.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "webkit/glue/p2p_transport.h"
 
 namespace webkit_glue {
 
 P2PTransport::Config::Config()
     : stun_server_port(0),
       relay_server_port(0),
       legacy_relay(false),
       tcp_receive_window(0),
       tcp_send_window(0),
       tcp_no_delay(false),
-      tcp_ack_delay_ms(0) {
+      tcp_ack_delay_ms(0),
+      protocols(0xffffffff) {
 }
 
 P2PTransport::Config::~Config() {
 }
 
 }  // namespace webkit_glue