Follow-up changes to https://codereview.chromium.org/795773002/

content/browser/ssl/ssl_client_auth_handler.h

 // Copyright (c) 2012 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_BROWSER_SSL_SSL_CLIENT_AUTH_HANDLER_H_
 #define CONTENT_BROWSER_SSL_SSL_CLIENT_AUTH_HANDLER_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
@@ skipping 25 matching lines @@
 
   // Selects a certificate and resumes the URL request with that certificate.
   void SelectCertificate();
 
  private:
   class Core;
 
   // Called when |core_| is done retrieving the cert list.
   void DidGetClientCerts();
 
-  // Called when the user has selected a cert.
+  // Called when the user has selected a cert. If the user chose to continue
+  // with no certificate, |cert| is NULL.
   void CertificateSelected(net::X509Certificate* cert);
 
   // A reference-counted core so the ClientCertStore may outlive
   // SSLClientAuthHandler if the handler is destroyed while an operation on the
   // ClientCertStore is in progress.
   scoped_refptr<Core> core_;
 
   // The net::URLRequest that triggered this client auth.
   net::URLRequest* request_;
 
   // The certs to choose from.
   scoped_refptr<net::SSLCertRequestInfo> cert_request_info_;
 
   // The callback to call when the certificate is selected.
   CertificateCallback callback_;
 
   base::WeakPtrFactory<SSLClientAuthHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SSLClientAuthHandler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SSL_SSL_CLIENT_AUTH_HANDLER_H_