Fix initial offline state response handling

net/base/network_change_notifier_linux_unittest.cc

 // Copyright (c) 2011 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 "net/base/network_change_notifier_linux.h"
 
 #include "base/bind.h"
 #include "base/message_loop_proxy.h"
 #include "base/synchronization/waitable_event.h"
 #include "dbus/mock_bus.h"
@@ skipping 62 matching lines @@
         &RunOnNotifierThreadHelper, callback, &event));
     event.Wait();
     // Run any tasks queued on the main thread, e.g. by
     // ObserverListThreadSafe.
     MessageLoop::current()->RunAllPending();
   }
 
   void SendResponse(uint32 state) {
     scoped_ptr<dbus::Response> response(dbus::Response::CreateEmpty());
     dbus::MessageWriter writer(response.get());
-    writer.AppendUint32(state);
+    writer.AppendVariantOfUint32(state);
     RunOnNotifierThread(base::Bind(response_callback_, response.get()));
   }
 
   void SendSignal(uint32 state) {
     dbus::Signal signal("org.freedesktop.NetworkManager", "StateChanged");
     dbus::MessageWriter writer(&signal);
     writer.AppendUint32(state);
     RunOnNotifierThread(base::Bind(signal_callback_, &signal));
   }
 
@@ skipping 124 matching lines @@
 TEST_F(NetworkChangeNotifierLinuxTest, InvalidResponse) {
   scoped_ptr<dbus::Response> response(dbus::Response::CreateEmpty());
   dbus::MessageWriter writer(response.get());
   writer.AppendUint16(20);  // Uint16 instead of the expected Uint32
   RunOnNotifierThread(base::Bind(response_callback_, response.get()));
   EXPECT_FALSE(NetworkChangeNotifier::IsOffline());
 }
 
 }  // namespace
 }  // namespace net