Update NSS libSSL to NSS_3_15_BETA2.

net/third_party/nss/patches/sslkeylogerror.patch

Index: net/third_party/nss/patches/sslkeylogerror.patch
===================================================================
--- net/third_party/nss/patches/sslkeylogerror.patch	(revision 196870)
+++ net/third_party/nss/patches/sslkeylogerror.patch	(working copy)
@@ -1,23 +0,0 @@
-diff -pu -r a/net/third_party/nss/ssl/sslsock.c b/net/third_party/nss/ssl/sslsock.c
---- a/net/third_party/nss/ssl/sslsock.c	2012-11-09 16:16:23.715038258 -0800
-+++ b/net/third_party/nss/ssl/sslsock.c	2012-11-09 16:19:18.517565894 -0800
-@@ -2906,11 +2906,15 @@ ssl_SetDefaultsFromEnvironment(void)
- 	ev = getenv("SSLKEYLOGFILE");
- 	if (ev && ev[0]) {
- 	    ssl_keylog_iob = fopen(ev, "a");
--	    if (ftell(ssl_keylog_iob) == 0) {
--		fputs("# SSL/TLS secrets log file, generated by NSS\n",
--		      ssl_keylog_iob);
-+	    if (!ssl_keylog_iob) {
-+		SSL_TRACE(("Failed to open key log file"));
-+	    } else {
-+		if (ftell(ssl_keylog_iob) == 0) {
-+		    fputs("# SSL/TLS secrets log file, generated by NSS\n",
-+			  ssl_keylog_iob);
-+		}
-+		SSL_TRACE(("SSL: logging SSL/TLS secrets to %s", ev));
- 	    }
--	    SSL_TRACE(("SSL: logging SSL/TLS secrets to %s", ev));
- 	}
- #ifndef NO_PKCS11_BYPASS
- 	ev = getenv("SSLBYPASS");