shill: cellular: make enable and disable for universal modems

Make enable and disable for universal modems.

BUG=chromium-os:28700
TEST=run unit tests, enable and disable a Y3300

Change-Id: Icaaa72b976bed0f597dac2c46140172a8d901913
Reviewed-on: https://gerrit.chromium.org/gerrit/19913
Commit-Ready: Jason Glasgow <jglasgow@chromium.org>
Reviewed-by: Jason Glasgow <jglasgow@chromium.org>
Tested-by: Jason Glasgow <jglasgow@chromium.org>
diff --git a/mock_mm1_modem_simple_proxy.cc b/mock_mm1_modem_simple_proxy.cc
new file mode 100644
index 0000000..42ecb0f
--- /dev/null
+++ b/mock_mm1_modem_simple_proxy.cc
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 The Chromium OS 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 "shill/mock_mm1_modem_simple_proxy.h"
+
+namespace shill {
+namespace mm1 {
+
+MockModemSimpleProxy::MockModemSimpleProxy() {}
+
+MockModemSimpleProxy::~MockModemSimpleProxy() {}
+
+}  // namespace mm1
+}  // namespace shill