This adds Cros API for calling the "Refresh" function on shill's

chrome/browser/chromeos/cros/network_library_impl_stub.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/cros/network_library_impl_stub.h"
 
 #include "base/bind.h"
 #include "content/public/browser/browser_thread.h"
 
 using content::BrowserThread;
@@ skipping 623 matching lines @@
   connect_delay_ms_ = kConnectDelayMs;
   SignalNetworkManagerObservers();
 }
 
 bool NetworkLibraryImplStub::GetWifiAccessPoints(
     WifiAccessPointVector* result) {
   *result = WifiAccessPointVector();
   return true;
 }
 
+void NetworkLibraryImplStub::RefreshIPConfig(Network* network) {
+}
+
 void NetworkLibraryImplStub::DisconnectFromNetwork(const Network* network) {
   // Update the network state here since no network manager in stub impl.
   Network* modify_network = const_cast<Network*>(network);
   modify_network->set_is_active(false);
   modify_network->set_disconnected();
   if (network == active_wifi_)
     active_wifi_ = NULL;
   else if (network == active_cellular_)
     active_cellular_ = NULL;
   else if (network == active_virtual_)
@@ skipping 16 matching lines @@
     HardwareAddressFormat format) {
   *hardware_address = hardware_address_;
   return ip_configs_;
 }
 
 void NetworkLibraryImplStub::SetIPConfig(const NetworkIPConfig& ipconfig) {
     ip_configs_.push_back(ipconfig);
 }
 
 }  // namespace chromeos