*WIP* Mac Unittest for client cert selection with intermediate certs

net/cert/cert_verify_proc_mac.cc

Index: net/cert/cert_verify_proc_mac.cc
diff --git a/net/cert/cert_verify_proc_mac.cc b/net/cert/cert_verify_proc_mac.cc
index 08f1b887f59dbcad6b8a2c2d304bce7117ed5e53..1fd2a8ad7d3b17a3e020885f2edeca4c10da2d4c 100644
--- a/net/cert/cert_verify_proc_mac.cc
+++ b/net/cert/cert_verify_proc_mac.cc
@@ -750,12 +750,10 @@ int VerifyWithGivenFlags(X509Certificate* cert,
       // running on the same machine, so instead tests may load pre-created
       // keychains using SecKeychainOpen and then inject them through
       // TestKeychainSearchList.
-      CFArrayRef keychain_search_list;
       status = TestKeychainSearchList::GetInstance()->CopySearchList(
-          &keychain_search_list);
+          &scoped_alternate_keychain_search_list);
       if (status)
         return NetErrorFromOSStatus(status);
-      scoped_alternate_keychain_search_list.reset(keychain_search_list);
     }
     if (try_reordered_keychain) {
       // If a TestKeychainSearchList is present, it will have already set