Update NSS libSSL to NSS_3_15_BETA2.

net/third_party/nss/patches/falsestartnpn.patch

-diff -pu -r a/net/third_party/nss/ssl/ssl3con.c b/net/third_party/nss/ssl/ssl3con.c
---- a/net/third_party/nss/ssl/ssl3con.c 2012-11-09 15:53:13.884846338 -0800
-+++ b/net/third_party/nss/ssl/ssl3con.c 2012-11-09 15:54:18.975797410 -0800
-@@ -6244,10 +6244,17 @@ ssl3_CanFalseStart(sslSocket *ss) {
-         !ss->sec.isServer &&
-         !ss->ssl3.hs.isResuming &&
-         ss->ssl3.cwSpec &&
-+
-+        /* An attacker can control the selected ciphersuite so we only wish to
-+         * do False Start in the case that the selected ciphersuite is
-+         * sufficiently strong that the attack can gain no advantage.
-+         * Therefore we require an 80-bit cipher and a forward-secret key
-+         * exchange. */
-         ss->ssl3.cwSpec->cipher_def->secret_key_size >= 10 &&
--       (ss->ssl3.hs.kea_def->exchKeyType == ssl_kea_rsa ||
--        ss->ssl3.hs.kea_def->exchKeyType == ssl_kea_dh  ||
--        ss->ssl3.hs.kea_def->exchKeyType == ssl_kea_ecdh);
-+       (ss->ssl3.hs.kea_def->kea == kea_dhe_dss ||
-+        ss->ssl3.hs.kea_def->kea == kea_dhe_rsa ||
-+        ss->ssl3.hs.kea_def->kea == kea_ecdhe_ecdsa ||
-+        ss->ssl3.hs.kea_def->kea == kea_ecdhe_rsa);
-     ssl_ReleaseSpecReadLock(ss);
-     return rv;
- }
-diff -pu -r a/net/third_party/nss/ssl/ssl3ext.c b/net/third_party/nss/ssl/ssl3ext.c
---- a/net/third_party/nss/ssl/ssl3ext.c 2012-11-09 15:39:36.842891686 -0800
-+++ b/net/third_party/nss/ssl/ssl3ext.c 2012-11-09 15:56:10.157421377 -0800
-@@ -537,6 +537,12 @@ ssl3_ServerHandleNextProtoNegoXtn(sslSoc
-        return SECFailure;
-     }
- 
-+    ss->xtnData.negotiated[ss->xtnData.numNegotiated++] = ex_type;
-+
-+    /* TODO: server side NPN support would require calling
-+     * ssl3_RegisterServerHelloExtensionSender here in order to echo the
-+     * extension back to the client. */
-+
-     return SECSuccess;
- }
- 
-@@ -605,6 +611,8 @@ ssl3_ClientHandleNextProtoNegoXtn(sslSoc
-        return SECFailure;
-     }
- 
-+    ss->xtnData.negotiated[ss->xtnData.numNegotiated++] = ex_type;
-+
-     SECITEM_FreeItem(&ss->ssl3.nextProto, PR_FALSE);
-     return SECITEM_CopyItem(NULL, &ss->ssl3.nextProto, &result);
- }