This applies GUIDs to certificate and key nicknames when

net/base/cert_database_openssl.cc

 // Copyright (c) 2011 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/base/cert_database.h"
 
 #include <openssl/x509.h>
 
 #include "base/logging.h"
 #include "net/base/crypto_module.h"
@@ skipping 64 matching lines @@
   NOTIMPLEMENTED();
   return 0;
 }
 
 bool CertDatabase::DeleteCertAndKey(const X509Certificate* cert) {
   // TODO(bulach): implement me.
   NOTIMPLEMENTED();
   return false;
 }
 
-bool CertDatabase::DeleteCertAndKeyByLabel(const std::string& label) {
-  // TODO(gspencer):Find the certificate with the given label
-  // (nickname), and delete it.
-  NOTIMPLEMENTED();
-  return false;
-}
-
 CertDatabase::TrustBits CertDatabase::GetCertTrust(const X509Certificate* cert,
                                                    CertType type) const {
   // TODO(bulach): implement me.
   NOTIMPLEMENTED();
   return 0;
 }
 
 bool CertDatabase::SetCertTrust(const X509Certificate* cert,
                                 CertType type,
                                 TrustBits trust_bits) {
   // TODO(bulach): implement me.
   NOTIMPLEMENTED();
   return false;
 }
 
 }  // namespace net