Cancel client auth requests when not promptable.

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 X509Certificate;
+}
+
+namespace content {
+
+// A delegate interface for selecting a client certificate for use with a
+// network request.
+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.
+  //
+  // TODO(davidben): Some calls to ContinueWithCertificate(nullptr) should be
+  // CancelCertificateSelection. Switch them all as appropriate.
+  virtual void ContinueWithCertificate(net::X509Certificate* cert) = 0;
+
+  // Called to abort the request.
+  virtual void CancelCertificateSelection() = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ClientCertificateDelegate);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_CLIENT_CERTIFICATE_DELEGATE_H_