This adds a private extension API to use for simple networking

chrome/browser/chromeos/options/vpn_config_view.cc

 // Copyright (c) 2012 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 "chrome/browser/chromeos/options/vpn_config_view.h"
 
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
@@ skipping 896 matching lines @@
 void VPNConfigView::ParseVPNUIProperty(NetworkPropertyUIData* property_ui_data,
                                        Network* network,
                                        const std::string& dict_key,
                                        const std::string& key) {
   NetworkLibrary* network_library = CrosLibrary::Get()->GetNetworkLibrary();
   const base::DictionaryValue* onc =
       network_library->FindOncForNetwork(network->unique_id());
 
   property_ui_data->ParseOncProperty(
       network->ui_data(), onc,
-      base::StringPrintf("%s.%s.%s", onc::kVPN, dict_key.c_str(), key.c_str()));
+      base::StringPrintf("%s.%s.%s",
+                         onc::network_config::kVPN,
+                         dict_key.c_str(),
+                         key.c_str()));
 }
 
 }  // namespace chromeos