Update from https://crrev.com/304121

net/http/http_network_transaction.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.
 
 #include "net/http/http_network_transaction.h"
 
 #include <set>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 72 matching lines @@
     alternate_protocol_values.push_back(alternate_protocol_str);
   }
 
   session->http_stream_factory()->ProcessAlternateProtocol(
       session->http_server_properties(),
       alternate_protocol_values,
       http_host_port_pair,
       *session);
 }
 
-// Returns true if |error| is a client certificate authentication error.
-bool IsClientCertificateError(int error) {
-  switch (error) {
-    case ERR_BAD_SSL_CLIENT_AUTH_CERT:
-    case ERR_SSL_CLIENT_AUTH_PRIVATE_KEY_ACCESS_DENIED:
-    case ERR_SSL_CLIENT_AUTH_CERT_NO_PRIVATE_KEY:
-    case ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED:
-      return true;
-    default:
-      return false;
-  }
-}
-
 base::Value* NetLogSSLVersionFallbackCallback(
     const GURL* url,
     int net_error,
     uint16 version_before,
     uint16 version_after,
     NetLog::LogLevel /* log_level */) {
   base::DictionaryValue* dict = new base::DictionaryValue();
   dict->SetString("host_and_port", GetHostAndPort(*url));
   dict->SetInteger("net_error", net_error);
   dict->SetInteger("version_before", version_before);
@@ skipping 1406 matching lines @@
       description = base::StringPrintf("Unknown state 0x%08X (%u)", state,
                                        state);
       break;
   }
   return description;
 }
 
 #undef STATE_CASE
 
 }  // namespace net