Update NSS libSSL to NSS_3_15_BETA2.

net/third_party/nss/ssl/dtlscon.c

 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /*
  * DTLS Protocol
  */
-/* $Id: dtlscon.c,v 1.5 2012/09/28 01:46:45 wtc%google.com Exp $ */
+/* $Id$ */
 
 #include "ssl.h"
 #include "sslimpl.h"
 #include "sslproto.h"
 
 #ifndef PR_ARRAY_SIZE
 #define PR_ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0]))
 #endif
 
 static SECStatus dtls_TransmitMessageFlight(sslSocket *ss);
@@ skipping 1105 matching lines @@
     desired = PR_MillisecondsToInterval(ss->ssl3.hs.rtTimeoutMs);
     if (elapsed > desired) {
         /* Timer expired */
         *timeout = PR_INTERVAL_NO_WAIT;
     } else {
         *timeout = desired - elapsed;
     }
 
     return SECSuccess;
 }