Revert of chromeos: Convert ash VPNDelegate interface to mojo

ash/mus/vpn_delegate_mus.cc

Index: ash/mus/vpn_delegate_mus.cc
diff --git a/ash/mus/vpn_delegate_mus.cc b/ash/mus/vpn_delegate_mus.cc
new file mode 100644
index 0000000000000000000000000000000000000000..8e8a76708141ecdc9852f618ba5f5734dacceedd
--- /dev/null
+++ b/ash/mus/vpn_delegate_mus.cc
@@ -0,0 +1,17 @@
+// Copyright 2016 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 "ash/mus/vpn_delegate_mus.h"
+
+namespace ash {
+
+VPNDelegateMus::VPNDelegateMus() {}
+
+VPNDelegateMus::~VPNDelegateMus() {}
+
+void VPNDelegateMus::ShowAddPage(const std::string& extension_id) {
+  // TODO(mash): http://crbug.com/651148
+}
+
+}  // namespace ash