This is the first pass at making GetIPConfigs asynchronous.

chromeos/network/network_sms_handler.cc

Index: chromeos/network/network_sms_handler.cc
diff --git a/chromeos/network/network_sms_handler.cc b/chromeos/network/network_sms_handler.cc
index f70314b08f8251242794c8231e31b8b5fecc0c88..770b251d66420b4d0cf012b6cf15d4bda6aba898 100644
--- a/chromeos/network/network_sms_handler.cc
+++ b/chromeos/network/network_sms_handler.cc
@@ -366,13 +366,14 @@ void NetworkSmsHandler::NotifyMessageReceived(
 
 void NetworkSmsHandler::ManagerPropertiesCallback(
     DBusMethodCallStatus call_status,
-    const base::DictionaryValue& properties) {
+    scoped_ptr<base::DictionaryValue> properties) {
   if (call_status != DBUS_METHOD_CALL_SUCCESS) {
     LOG(ERROR) << "NetworkSmsHandler: Failed to get manager properties.";
     return;
   }
   const base::Value* value;
-  if (!properties.GetWithoutPathExpansion(flimflam::kDevicesProperty, &value) ||
+  if (!properties->GetWithoutPathExpansion(
+          flimflam::kDevicesProperty, &value) ||
       value->GetType() != base::Value::TYPE_LIST) {
     LOG(ERROR) << "NetworkSmsHandler: No list value for: "
                << flimflam::kDevicesProperty;
@@ -398,7 +399,7 @@ void NetworkSmsHandler::ManagerPropertiesCallback(
 void NetworkSmsHandler::DevicePropertiesCallback(
     const std::string& device_path,
     DBusMethodCallStatus call_status,
-    const base::DictionaryValue& properties) {
+    scoped_ptr<base::DictionaryValue> properties) {
   if (call_status != DBUS_METHOD_CALL_SUCCESS) {
     LOG(ERROR) << "NetworkSmsHandler: ERROR: " << call_status
                << " For: " << device_path;
@@ -406,7 +407,7 @@ void NetworkSmsHandler::DevicePropertiesCallback(
   }
 
   std::string device_type;
-  if (!properties.GetStringWithoutPathExpansion(
+  if (!properties->GetStringWithoutPathExpansion(
           flimflam::kTypeProperty, &device_type)) {
     LOG(ERROR) << "NetworkSmsHandler: No type for: " << device_path;
     return;
@@ -415,14 +416,14 @@ void NetworkSmsHandler::DevicePropertiesCallback(
     return;
 
   std::string dbus_connection;
-  if (!properties.GetStringWithoutPathExpansion(
+  if (!properties->GetStringWithoutPathExpansion(
           flimflam::kDBusConnectionProperty, &dbus_connection)) {
     LOG(ERROR) << "Device has no DBusConnection Property: " << device_path;
     return;
   }
 
   std::string object_path_string;
-  if (!properties.GetStringWithoutPathExpansion(
+  if (!properties->GetStringWithoutPathExpansion(
           flimflam::kDBusObjectProperty, &object_path_string)) {
     LOG(ERROR) << "Device has no DBusObject Property: " << device_path;
     return;