Revert of Make ONCCertificateImporter async.

chromeos/network/onc/mock_certificate_importer.cc

Index: chromeos/network/onc/mock_certificate_importer.cc
diff --git a/chromeos/network/onc/mock_certificate_importer.cc b/chromeos/network/onc/mock_certificate_importer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5ae7fb200e9a1cdea84ce7dc8c9fa6573ecd3531
--- /dev/null
+++ b/chromeos/network/onc/mock_certificate_importer.cc
@@ -0,0 +1,17 @@
+// Copyright 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.
+
+#include "chromeos/network/onc/mock_certificate_importer.h"
+
+namespace chromeos {
+namespace onc {
+
+MockCertificateImporter::MockCertificateImporter() {
+}
+
+MockCertificateImporter::~MockCertificateImporter() {
+}
+
+}  // namespace onc
+}  // namespace chromeos