Update from https://crrev.com/308331

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 "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "net/base/net_export.h"
 #include "net/cert/x509_certificate.h"
+#include "net/socket/next_proto.h"
 
 namespace net {
 
 // Various TLS/SSL ProtocolVersion values encoded as uint16
 //      struct {
 //          uint8 major;
 //          uint8 minor;
 //      } ProtocolVersion;
 // The most significant byte is |major|, and the least significant byte
 // is |minor|.
@@ skipping 126 matching lines @@
   // revocation checking is disabled.
   // NOTE: Only used by NSS.
   bool cert_io_enabled;
 
   // The list of application level protocols supported. If set, this will
   // enable Next Protocol Negotiation (if supported). The order of the
   // protocols doesn't matter expect for one case: if the server supports Next
   // Protocol Negotiation, but there is no overlap between the server's and
   // client's protocol sets, then the first protocol in this list will be
   // requested by the client.
-  std::vector<std::string> next_protos;
+  NextProtoVector next_protos;
 
   scoped_refptr<X509Certificate> client_cert;
 };
 
 }  // namespace net
 
 #endif  // NET_SSL_SSL_CONFIG_H_