Refactor X509Certificate caching to cache the OS handle, rather than the X509Certificate

net/base/x509_certificate_nss.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/x509_certificate.h"
 
 #include <cert.h>
 #include <cryptohi.h>
 #include <keyhi.h>
 #include <nss.h>
@@ skipping 732 matching lines @@
   // Sign the ASN1 encoded cert and save it to |result|.
   rv = SEC_DerSignData(arena, result, der.data, der.len, key->key(), algo_id);
   if (rv != SECSuccess) {
     CERT_DestroyCertificate(cert);
     return NULL;
   }
 
   // Save the signed result to the cert.
   cert->derCert = *result;
 
-  X509Certificate* x509_cert =
-      CreateFromHandle(cert, SOURCE_LONE_CERT_IMPORT, OSCertHandles());
+  X509Certificate* x509_cert = CreateFromHandle(cert, OSCertHandles());
   CERT_DestroyCertificate(cert);
   return x509_cert;
 }
 
 void X509Certificate::GetDNSNames(std::vector<std::string>* dns_names) const {
   dns_names->clear();
 
   // Compare with CERT_VerifyCertName().
   GetCertSubjectAltNamesOfType(cert_handle_, certDNSName, dns_names);
 
@@ skipping 239 matching lines @@
 
 // static
 bool X509Certificate::WriteOSCertHandleToPickle(OSCertHandle cert_handle,
                                                 Pickle* pickle) {
   return pickle->WriteData(
       reinterpret_cast<const char*>(cert_handle->derCert.data),
       cert_handle->derCert.len);
 }
 
 }  // namespace net