Refactor client cert private key handling.

net/ssl/client_cert_store_mac.h

Index: net/ssl/client_cert_store_mac.h
diff --git a/net/ssl/client_cert_store_mac.h b/net/ssl/client_cert_store_mac.h
index 1bad779dd35377fb284356148a9d8eb1f1f5bd3d..fc00574705d0808d38af95e001311179774662bf 100644
--- a/net/ssl/client_cert_store_mac.h
+++ b/net/ssl/client_cert_store_mac.h
@@ -31,19 +31,19 @@ class NET_EXPORT ClientCertStoreMac : public ClientCertStore {
   // Implemented by creating a list of certificates that otherwise would be
   // extracted from the system store and filtering it using the common logic
   // (less adequate than the approach used on Windows).
-  bool SelectClientCertsForTesting(const CertificateList& input_certs,
+  bool SelectClientCertsForTesting(ClientCertIdentityList input_certs,
                                    const SSLCertRequestInfo& cert_request_info,
-                                   CertificateList* selected_certs);
+                                   ClientCertIdentityList* selected_certs);
 
   // Testing hook specific to Mac, where the internal logic recognizes preferred
   // certificates for particular domains. If the preferred certificate is
   // present in the output list (i.e. it doesn't get filtered out), it should
   // always come first.
   bool SelectClientCertsGivenPreferredForTesting(
-      const scoped_refptr<X509Certificate>& preferred_cert,
-      const CertificateList& regular_certs,
+      std::unique_ptr<ClientCertIdentity> preferred_cert,
+      ClientCertIdentityList regular_certs,
       const SSLCertRequestInfo& request,
-      CertificateList* selected_certs);
+      ClientCertIdentityList* selected_certs);
 
   DISALLOW_COPY_AND_ASSIGN(ClientCertStoreMac);
 };