This is the first pass at making GetIPConfigs asynchronous.

chrome/browser/chromeos/net/network_change_notifier_chromeos.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/net/network_change_notifier_chromeos.h"
 
 #include "base/bind.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 113 matching lines @@
   // Active network changed?
   if (network->service_path() != service_path_)
     UpdateNetworkState(cros);
   else
     UpdateConnectivityState(network);
 }
 
 void NetworkChangeNotifierChromeos::UpdateNetworkState(
     chromeos::NetworkLibrary* lib) {
   const chromeos::Network* network = lib->active_network();
+  if (network) {
+    lib->GetIPConfigs(
+        network->device_path(),
+        chromeos::NetworkLibrary::FORMAT_COLON_SEPARATED_HEX,
+        base::Bind(&NetworkChangeNotifierChromeos::UpdateNetworkStateCallback,
+                   weak_factory_.GetWeakPtr(),
+                   lib));
+  }
+}
+
+void NetworkChangeNotifierChromeos::UpdateNetworkStateCallback(
+    chromeos::NetworkLibrary* lib,
+    const NetworkIPConfigVector& ipconfigs,
+    const std::string& hardware_address) {
+  const chromeos::Network* network = lib->active_network();
 
   if (network) {
-    VLOG(1) << "UpdateNetworkState: " << network->name()
+    VLOG(1) << "UpdateNetworkStateCallback: " << network->name()
             << ", type= " << network->type()
             << ", device= " << network->device_path()
             << ", state= " << network->state();
   }
 
   // Check if active network was added, removed or changed.
   if ((!network && has_active_network_) ||
       (network && (!has_active_network_ ||
                    network->service_path() != service_path_ ||
                    network->ip_address() != ip_address_))) {
@@ skipping 136 matching lines @@
       }
     case chromeos::TYPE_BLUETOOTH:
     case chromeos::TYPE_VPN:
     case chromeos::TYPE_UNKNOWN:
       break;
   }
   return net::NetworkChangeNotifier::CONNECTION_UNKNOWN;
 }
 
 }  // namespace chromeos