Refactor client cert private key handling.

net/url_request/url_request.h

Index: net/url_request/url_request.h
diff --git a/net/url_request/url_request.h b/net/url_request/url_request.h
index e1406f33633922e9ebc4625d62b3518b409d361c..d1dd42bc670ded330c0e1c65ac4c3eeea85cac83 100644
--- a/net/url_request/url_request.h
+++ b/net/url_request/url_request.h
@@ -600,8 +600,8 @@ class NET_EXPORT URLRequest : NON_EXPORTED_BASE(public base::NonThreadSafe),
   // This method can be called after the user selects a client certificate to
   // instruct this URLRequest to continue with the request with the
   // certificate.  Pass NULL if the user doesn't have a client certificate.
-  void ContinueWithCertificate(X509Certificate* client_cert,
-                               SSLPrivateKey* client_private_key);
+  void ContinueWithCertificate(scoped_refptr<X509Certificate> client_cert,
+                               scoped_refptr<SSLPrivateKey> client_private_key);
 
   // This method can be called after some error notifications to instruct this
   // URLRequest to ignore the current error and continue with the request.  To