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

net/base/cert_database_nss_unittest.cc

Index: net/base/cert_database_nss_unittest.cc
diff --git a/net/base/cert_database_nss_unittest.cc b/net/base/cert_database_nss_unittest.cc
index 70d4224a89aac91a84b7cf10d8b9afda991ccb16..7afb651d623adad45b19ce53cee475eed99cac41 100644
--- a/net/base/cert_database_nss_unittest.cc
+++ b/net/base/cert_database_nss_unittest.cc
@@ -51,11 +51,8 @@ CertificateList ListCertsInSlot(PK11SlotInfo* slot) {
   for (CERTCertListNode* node = CERT_LIST_HEAD(cert_list);
        !CERT_LIST_END(node, cert_list);
        node = CERT_LIST_NEXT(node)) {
-    result.push_back(
-        X509Certificate::CreateFromHandle(
-            node->cert,
-            X509Certificate::SOURCE_LONE_CERT_IMPORT,
-            X509Certificate::OSCertHandles()));
+    result.push_back(X509Certificate::CreateFromHandle(
+        node->cert, X509Certificate::OSCertHandles()));
   }
   CERT_DestroyCertList(cert_list);