Make CertificateHandler a proper interface of CertificateImporter.

chromeos/network/certificate_handler.h

-// Copyright (c) 2013 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 CHROMEOS_NETWORK_CERTIFICATE_HANDLER_H_
-#define CHROMEOS_NETWORK_CERTIFICATE_HANDLER_H_
-
-#include "base/memory/ref_counted.h"
-#include "chromeos/chromeos_export.h"
-#include "chromeos/network/onc/onc_constants.h"
-#include "net/cert/x509_certificate.h"
-
-namespace base {
-class ListValue;
-}
-
-namespace chromeos {
-
-class CHROMEOS_EXPORT CertificateHandler {
- public:
-  CertificateHandler();
-  virtual ~CertificateHandler();
-
-  // Import the |certificates|, which must be a list of ONC Certificate objects.
-  // If |onc_trusted_certificates| is not NULL, it will be filled with the list
-  // of certificates that requested the TrustBit "Web". If
-  // |imported_server_and_ca_certs| is not null, it will be filled with the
-  // (GUID, Certificate) pairs of all successfully imported Server and CA
-  // certificates. Returns true if all certificates were imported successfully.
-  virtual bool ImportCertificates(
-      const base::ListValue& certificates,
-      onc::ONCSource source,
-      net::CertificateList* onc_trusted_certificates);
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(CertificateHandler);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROMEOS_NETWORK_CERTIFICATE_HANDLER_H_