This is the first pass at making GetIPConfigs asynchronous.

chromeos/network/network_sms_handler.h

Index: chromeos/network/network_sms_handler.h
diff --git a/chromeos/network/network_sms_handler.h b/chromeos/network/network_sms_handler.h
index 5bbe09e8d1431e251eb445d16fd40fa1797e54d5..f2a0ee9df91bafa19174151c19cee0b007d3ab04 100644
--- a/chromeos/network/network_sms_handler.h
+++ b/chromeos/network/network_sms_handler.h
@@ -56,13 +56,13 @@ class CHROMEOS_EXPORT NetworkSmsHandler {
 
   // Callback to handle the manager properties with the list of devices.
   void ManagerPropertiesCallback(DBusMethodCallStatus call_status,
-                                 const base::DictionaryValue& properties);
+                                 scoped_ptr<base::DictionaryValue> properties);
 
   // Callback to handle the device properties for |device_path|.
   // A NetworkSmsDeviceHandler will be instantiated for each cellular device.
   void DevicePropertiesCallback(const std::string& device_path,
                                 DBusMethodCallStatus call_status,
-                                const base::DictionaryValue& properties);
+                                scoped_ptr<base::DictionaryValue> properties);
 
   ObserverList<Observer> observers_;
   ScopedVector<NetworkSmsDeviceHandler> device_handlers_;