Refactor client cert private key handling.

net/url_request/url_request.cc

Index: net/url_request/url_request.cc
diff --git a/net/url_request/url_request.cc b/net/url_request/url_request.cc
index 535e940ee33517a089d198461406be9962e830b9..a3b80286a898e3e8ae13a2dda7026e57e9a2fab7 100644
--- a/net/url_request/url_request.cc
+++ b/net/url_request/url_request.cc
@@ -875,15 +875,17 @@ void URLRequest::CancelAuth() {
   job_->CancelAuth();
 }
 
-void URLRequest::ContinueWithCertificate(X509Certificate* client_cert,
-                                         SSLPrivateKey* client_private_key) {
+void URLRequest::ContinueWithCertificate(
+    scoped_refptr<X509Certificate> client_cert,
+    scoped_refptr<SSLPrivateKey> client_private_key) {
   DCHECK(job_.get());
 
   // Matches the call in NotifyCertificateRequested.
   OnCallToDelegateComplete();
 
   status_ = URLRequestStatus::FromError(ERR_IO_PENDING);
-  job_->ContinueWithCertificate(client_cert, client_private_key);
+  job_->ContinueWithCertificate(std::move(client_cert),
+                                std::move(client_private_key));
 }
 
 void URLRequest::ContinueDespiteLastError() {