This is the first pass at making GetIPConfigs asynchronous.

chrome/browser/chromeos/cros/sms_watcher.cc

Index: chrome/browser/chromeos/cros/sms_watcher.cc
diff --git a/chrome/browser/chromeos/cros/sms_watcher.cc b/chrome/browser/chromeos/cros/sms_watcher.cc
index c5a43356820de7070f032ab55de1c5a875f68b1c..82d099e9456b78aa3965a526d7cca01927c8f53a 100644
--- a/chrome/browser/chromeos/cros/sms_watcher.cc
+++ b/chrome/browser/chromeos/cros/sms_watcher.cc
@@ -375,19 +375,19 @@ SMSWatcher::~SMSWatcher() {
 
 void SMSWatcher::DevicePropertiesCallback(
     DBusMethodCallStatus call_status,
-    const base::DictionaryValue& properties) {
+    scoped_ptr<base::DictionaryValue> properties) {
   if (call_status != DBUS_METHOD_CALL_SUCCESS)
     return;
 
   std::string dbus_connection;
-  if (!properties.GetStringWithoutPathExpansion(
+  if (!properties->GetStringWithoutPathExpansion(
           flimflam::kDBusConnectionProperty, &dbus_connection)) {
     LOG(WARNING) << "Modem device properties do not include DBus connection.";
     return;
   }
 
   std::string object_path_string;
-  if (!properties.GetStringWithoutPathExpansion(
+  if (!properties->GetStringWithoutPathExpansion(
           flimflam::kDBusObjectProperty, &object_path_string)) {
     LOG(WARNING) << "Modem device properties do not include DBus object.";
     return;