Also allow ALPN to enable TLS False Start.

net/socket/ssl_client_socket_nss.cc

 // Copyright (c) 2012 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.
 
 // This file includes code SSLClientSocketNSS::DoVerifyCertComplete() derived
 // from AuthCertificateCallback() in
 // mozilla/security/manager/ssl/src/nsNSSCallbacks.cpp.
 
 /* ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
@@ skipping 1263 matching lines @@
     PRFileDesc* socket,
     PRBool checksig,
     PRBool is_server) {
 #ifdef SSL_ENABLE_FALSE_START
   Core* core = reinterpret_cast<Core*>(arg);
   if (!core->handshake_callback_called_) {
     // Only need to turn off False Start in the initial handshake. Also, it is
     // unsafe to call SSL_OptionSet in a renegotiation because the "first
     // handshake" lock isn't already held, which will result in an assertion
     // failure in the ssl_Get1stHandshakeLock call in SSL_OptionSet.
-    PRBool npn;
+    PRBool negotiated_extension;
     SECStatus rv = SSL_HandshakeNegotiatedExtension(socket,
                                                     ssl_next_proto_nego_xtn,
-                                                    &npn);
-    if (rv != SECSuccess || !npn) {
-      // If the server doesn't support NPN, then we don't do False Start with
-      // it.
+                                                    &negotiated_extension);
+    if (rv != SECSuccess || !negotiated_extension) {
+      rv = SSL_HandshakeNegotiatedExtension(socket,
+                                            ssl_application_layer_protocol,
+                                            &negotiated_extension);
+    }
+    if (rv != SECSuccess || !negotiated_extension) {
+      // If the server doesn't support NPN or ALPN, then we don't do False
+      // Start with it.
       SSL_OptionSet(socket, SSL_ENABLE_FALSE_START, PR_FALSE);
     }
   }
 #endif
 
   // Tell NSS to not verify the certificate.
   return SECSuccess;
 }
 
 #if defined(NSS_PLATFORM_CLIENT_AUTH)
@@ skipping 2231 matching lines @@
   EnsureThreadIdAssigned();
   base::AutoLock auto_lock(lock_);
   return valid_thread_id_ == base::PlatformThread::CurrentId();
 }
 
 ServerBoundCertService* SSLClientSocketNSS::GetServerBoundCertService() const {
   return server_bound_cert_service_;
 }
 
 }  // namespace net