Remove ERR_SSL_UNSAFE_NEGOTIATION error code.

net/base/net_error_list.h

 // 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 intentionally does not have header guards, it's included
 // inside a macro to generate enum values.
 
 // This file contains the list of network errors.
 
 //
@@ skipping 188 matching lines @@
 // it supports it.
 NET_ERROR(SSL_DECOMPRESSION_FAILURE_ALERT, -125)
 
 // An SSL peer sent us a fatal bad_record_mac alert. This has been observed
 // from servers with buggy DEFLATE support.
 NET_ERROR(SSL_BAD_RECORD_MAC_ALERT, -126)
 
 // The proxy requested authentication (for tunnel establishment).
 NET_ERROR(PROXY_AUTH_REQUESTED, -127)
 
-// A known TLS strict server didn't offer the renegotiation extension.
-NET_ERROR(SSL_UNSAFE_NEGOTIATION, -128)
-
 // The SSL server attempted to use a weak ephemeral Diffie-Hellman key.
 NET_ERROR(SSL_WEAK_SERVER_EPHEMERAL_DH_KEY, -129)
 
 // Could not create a connection to the proxy server. An error occurred
 // either in resolving its name, or in connecting a socket to it.
 // Note that this does NOT include failures during the actual "CONNECT" method
 // of an HTTP proxy.
 NET_ERROR(PROXY_CONNECTION_FAILED, -130)
 
 // A mandatory proxy configuration could not be used. Currently this means
@@ skipping 574 matching lines @@
 NET_ERROR(DNS_TIMED_OUT, -803)
 
 // The entry was not found in cache, for cache-only lookups.
 NET_ERROR(DNS_CACHE_MISS, -804)
 
 // Suffix search list rules prevent resolution of the given host name.
 NET_ERROR(DNS_SEARCH_EMPTY, -805)
 
 // Failed to sort addresses according to RFC3484.
 NET_ERROR(DNS_SORT_ERROR, -806)