This adds a private extension API to use for simple networking

chrome/browser/chromeos/proxy_config_service_impl.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/proxy_config_service_impl.h"
 
 #include <ostream>
 
 #include "base/bind.h"
 #include "base/json/json_string_value_serializer.h"
@@ skipping 85 matching lines @@
     return true;  // editable if no network given.
 
   NetworkLibrary* network_library = CrosLibrary::Get()->GetNetworkLibrary();
   const base::DictionaryValue* onc =
        network_library->FindOncForNetwork(network->unique_id());
 
   NetworkPropertyUIData proxy_settings_ui_data;
   proxy_settings_ui_data.ParseOncProperty(
       network->ui_data(),
       onc,
-      onc::kProxySettings);
+      onc::network_config::kProxySettings);
   return proxy_settings_ui_data.editable();
 }
 
 // Only unblock if needed for debugging.
 #if defined(NEED_DEBUG_LOG)
 std::ostream& operator<<(
     std::ostream& out,
     const ProxyConfigServiceImpl::ProxyConfig::ManualProxy& proxy) {
   out << (proxy.server.is_valid() ? proxy.server.ToURI() : "") << "\n";
   return out;
@@ skipping 729 matching lines @@
     device_config_.clear();
     return;
   }
   if (!active_network_.empty()) {
     VLOG(1) << "Try migrating device config to " << active_network_;
     SetProxyConfigForNetwork(active_network_, device_config_, true);
   }
 }
 
 }  // namespace chromeos