This is the first pass at making GetIPConfigs asynchronous.

chromeos/dbus/shill_client_helper.h

 // 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.
 
 #ifndef CHROMEOS_DBUS_SHILL_CLIENT_HELPER_H_
 #define CHROMEOS_DBUS_SHILL_CLIENT_HELPER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 23 matching lines @@
 class Signal;
 
 }  // namespace dbus
 
 namespace chromeos {
 
 // A class to help implement Shill clients.
 class ShillClientHelper {
  public:
   // A callback to handle PropertyChanged signals.
-  typedef base::Callback<void(const std::string& name,
-                              const base::Value& value)> PropertyChangedHandler;
+  typedef base::Callback<void(
+      const std::string& name,
+      scoped_ptr<base::Value> value)> PropertyChangedHandler;
 
   // A callback to handle responses for methods with DictionaryValue results.
   typedef base::Callback<void(
       DBusMethodCallStatus call_status,
-      const base::DictionaryValue& result)> DictionaryValueCallback;
+      scoped_ptr<base::DictionaryValue> result)> DictionaryValueCallback;
 
   // A callback to handle responses for methods with DictionaryValue results.
   // This is used by CallDictionaryValueMethodWithErrorCallback.
-  typedef base::Callback<void(const base::DictionaryValue& result
+  typedef base::Callback<void(scoped_ptr<base::DictionaryValue> result
                               )> DictionaryValueCallbackWithoutStatus;
 
   // A callback to handle errors for method call.
   typedef base::Callback<void(const std::string& error_name,
                               const std::string& error_message)> ErrorCallback;
 
   ShillClientHelper(dbus::Bus* bus, dbus::ObjectProxy* proxy);
 
   virtual ~ShillClientHelper();
 
@@ skipping 104 matching lines @@
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<ShillClientHelper> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ShillClientHelper);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_SHILL_CLIENT_HELPER_H_