This is the first pass at making GetIPConfigs asynchronous.

chromeos/dbus/shill_device_client.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 "chromeos/dbus/shill_device_client.h"
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "base/stl_util.h"
 #include "base/values.h"
@@ skipping 381 matching lines @@
     // Manager entry.
     AddDevice("stub_cellular_device1", flimflam::kTypeCellular,
               "/device/cellular1", "/stub");
   }
 
   void PassStubDeviceProperties(const dbus::ObjectPath& device_path,
                                 const DictionaryValueCallback& callback) const {
     const base::DictionaryValue* device_properties = NULL;
     if (!stub_devices_.GetDictionaryWithoutPathExpansion(
             device_path.value(), &device_properties)) {
-      base::DictionaryValue empty_dictionary;
-      callback.Run(DBUS_METHOD_CALL_FAILURE, empty_dictionary);
+      scoped_ptr<base::DictionaryValue> empty_dictionary(
+          new base::DictionaryValue);
+      callback.Run(DBUS_METHOD_CALL_FAILURE, empty_dictionary.Pass());
       return;
     }
-    callback.Run(DBUS_METHOD_CALL_SUCCESS, *device_properties);
+    scoped_ptr<base::DictionaryValue> properties_copy(
+        device_properties->DeepCopy());
+    callback.Run(DBUS_METHOD_CALL_SUCCESS, properties_copy.Pass());
   }
 
   // Posts a task to run a void callback with status code |status|.
   void PostVoidCallback(const VoidDBusMethodCallback& callback,
                         DBusMethodCallStatus status) {
     MessageLoop::current()->PostTask(FROM_HERE,
                                      base::Bind(callback, status));
   }
 
   base::DictionaryValue* GetDeviceProperties(const std::string& device_path) {
@@ skipping 26 matching lines @@
 ShillDeviceClient* ShillDeviceClient::Create(
     DBusClientImplementationType type,
     dbus::Bus* bus) {
   if (type == REAL_DBUS_CLIENT_IMPLEMENTATION)
     return new ShillDeviceClientImpl(bus);
   DCHECK_EQ(STUB_DBUS_CLIENT_IMPLEMENTATION, type);
   return new ShillDeviceClientStubImpl();
 }
 
 }  // namespace chromeos