Remove NPN from SSLConfig and SSLClientSocket*.

net/ssl/ssl_config.h

 // Copyright 2014 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.
 
 #ifndef NET_SSL_SSL_CONFIG_H_
 #define NET_SSL_SSL_CONFIG_H_
 
 #include <stdint.h>
 
 #include "base/memory/ref_counted.h"
@@ skipping 153 matching lines @@
   // intermediates or to perform OCSP/CRL fetches.) It also implies that online
   // revocation checking is disabled.
   // NOTE: Only used by NSS.
   bool cert_io_enabled;
 
   // The list of application level protocols supported with ALPN (Application
   // Layer Protocol Negotation), in decreasing order of preference.  Protocols
   // will be advertised in this order during TLS handshake.
   NextProtoVector alpn_protos;
 
-  // The list of application level protocols supported with NPN (Next Protocol
-  // Negotiation).  The last item on the list is selected if there is no overlap
-  // between |npn_protos| and the protocols supported by the server, otherwise
-  // server preference is observed and the order of |npn_protos| is irrelevant.
-  // Note that due to NSS limitations, ports which use NSS will use
-  // |alpn_protos| for both ALPN and NPN. However, if |npn_protos| is empty, NPN
-  // will still be disabled.
-  // TODO(bnc): Deprecate NPN, see https://crbug.com/526713.
-  NextProtoVector npn_protos;
-
   // True if renegotiation should be allowed for the default application-level
   // protocol when the peer negotiates neither ALPN nor NPN.
   bool renego_allowed_default;
 
   // The list of application-level protocols to enable renegotiation for.
   NextProtoVector renego_allowed_for_protos;
 
   scoped_refptr<X509Certificate> client_cert;
   scoped_refptr<SSLPrivateKey> client_private_key;
 };
 
 }  // namespace net
 
 #endif  // NET_SSL_SSL_CONFIG_H_