Remove use of deprecated base::ListValue::Append(Value*) overload in //chromeos.

chromeos/network/managed_network_configuration_handler_impl.cc

Index: chromeos/network/managed_network_configuration_handler_impl.cc
diff --git a/chromeos/network/managed_network_configuration_handler_impl.cc b/chromeos/network/managed_network_configuration_handler_impl.cc
index dd46255644671808b2ed3a43adce488bdf3117c7..71eed8b6b09e95a23b324c3cf51d91bdd9128b0a 100644
--- a/chromeos/network/managed_network_configuration_handler_impl.cc
+++ b/chromeos/network/managed_network_configuration_handler_impl.cc
@@ -768,7 +768,7 @@ void ManagedNetworkConfigurationHandlerImpl::GetDeviceStateProperties(
   base::ListValue* ip_configs = new base::ListValue;
   for (base::DictionaryValue::Iterator iter(device_state->ip_configs());
        !iter.IsAtEnd(); iter.Advance()) {
-    ip_configs->Append(iter.value().DeepCopy());
+    ip_configs->Append(iter.value().CreateDeepCopy());
   }
   properties->SetWithoutPathExpansion(shill::kIPConfigsProperty, ip_configs);
 }