Treat failure to parse certificates as SSL protocol errors.

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 329 matching lines @@
 // The SSL server requires falling back to a version older than the configured
 // minimum fallback version, and thus fallback failed.
 NET_ERROR(SSL_FALLBACK_BEYOND_MINIMUM_VERSION, -165)
 
 // Resolving a hostname to an IP address list included the IPv4 address
 // "127.0.53.53". This is a special IP address which ICANN has recommended to
 // indicate there was a name collision, and alert admins to a potential
 // problem.
 NET_ERROR(ICANN_NAME_COLLISION, -166)
 
+// The SSL server presented a certificate which could not be decoded. This is
+// not a certificate error code as no X509Certificate object is available. This
+// error is fatal.
+NET_ERROR(SSL_SERVER_CERT_BAD_FORMAT, -167)
+
 // Certificate error codes
 //
 // The values of certificate error codes must be consecutive.
 
 // The server responded with a certificate whose common name did not match
 // the host name.  This could mean:
 //
 // 1. An attacker has redirected our traffic to their server and is
 //    presenting a certificate for which they know the private key.
 //
@@ skipping 440 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)