Make CertificateHandler a proper interface of CertificateImporter.

chromeos/network/mock_certificate_handler.h

Index: chromeos/network/mock_certificate_handler.h
diff --git a/chromeos/network/mock_certificate_handler.h b/chromeos/network/mock_certificate_handler.h
deleted file mode 100644
index 984aa182163ae3be394f5b1c1520593336cda96f..0000000000000000000000000000000000000000
--- a/chromeos/network/mock_certificate_handler.h
+++ /dev/null
@@ -1,28 +0,0 @@
-// 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_MOCK_CERTIFICATE_HANDLER_H_
-#define CHROMEOS_NETWORK_MOCK_CERTIFICATE_HANDLER_H_
-
-#include "base/values.h"
-#include "chromeos/chromeos_export.h"
-#include "chromeos/network/certificate_handler.h"
-#include "testing/gmock/include/gmock/gmock.h"
-
-namespace chromeos {
-
-class CHROMEOS_EXPORT MockCertificateHandler : public CertificateHandler {
- public:
-  MockCertificateHandler();
-  virtual ~MockCertificateHandler();
-  MOCK_METHOD3(ImportCertificates, bool(const base::ListValue&,
-                                        onc::ONCSource,
-                                        net::CertificateList*));
- private:
-  DISALLOW_COPY_AND_ASSIGN(MockCertificateHandler);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROMEOS_NETWORK_MOCK_CERTIFICATE_HANDLER_H_