Refactor client cert private key handling.

chrome/browser/chromeos/net/client_cert_store_chromeos.h

Index: chrome/browser/chromeos/net/client_cert_store_chromeos.h
diff --git a/chrome/browser/chromeos/net/client_cert_store_chromeos.h b/chrome/browser/chromeos/net/client_cert_store_chromeos.h
index ae3f2fc0104175e719a2d9366e8750581c41b64f..3f66f8b32fc1103275937bb95d4d1577800bf20f 100644
--- a/chrome/browser/chromeos/net/client_cert_store_chromeos.h
+++ b/chrome/browser/chromeos/net/client_cert_store_chromeos.h
@@ -58,8 +58,8 @@ class ClientCertStoreChromeOS : public net::ClientCertStore {
                           const ClientCertListCallback& callback,
                           const net::CertificateList& additional_certs);
 
-  net::CertificateList GetAndFilterCertsOnWorkerThread(
-      std::unique_ptr<crypto::CryptoModuleBlockingPasswordDelegate>
+  net::ClientCertIdentityList GetAndFilterCertsOnWorkerThread(
+      scoped_refptr<crypto::CryptoModuleBlockingPasswordDelegate>
           password_delegate,
       const net::SSLCertRequestInfo* request,
       const net::CertificateList& additional_certs);