Refactor client cert private key handling.

content/public/browser/client_certificate_delegate.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_BROWSER_CLIENT_CERTIFICATE_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_CLIENT_CERTIFICATE_DELEGATE_H_
 
 #include "base/macros.h"
 
 namespace net {
+class SSLPrivateKey;
 class X509Certificate;
 }
 
 namespace content {
 
 // A delegate interface for selecting a client certificate for use with a
 // network request. If the delegate is destroyed without calling
 // ContinueWithCertificate, the certificate request will be aborted.
 class ClientCertificateDelegate {
  public:
   ClientCertificateDelegate() {}
   virtual ~ClientCertificateDelegate() {}
 
-  // Continue the request with |cert|. |cert| may be nullptr to continue without
-  // supplying a certificate. This decision will be remembered for future
-  // requests to the domain.
-  virtual void ContinueWithCertificate(net::X509Certificate* cert) = 0;
+  // Continue the request with |cert| and matching |key|. |cert| may be nullptr
+  // to continue without supplying a certificate. This decision will be
+  // remembered for future requests to the domain.
+  virtual void ContinueWithCertificate(
+      scoped_refptr<net::X509Certificate> cert,
+      scoped_refptr<net::SSLPrivateKey> key) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ClientCertificateDelegate);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_CLIENT_CERTIFICATE_DELEGATE_H_