nsresult
PluginModuleParent::BeginUpdateBackground(NPP instance,
                                          const nsIntRect& aRect,
                                          gfxContext** aCtx)
{
    PluginInstanceParent* i = InstCast(instance);
    if (!i)
        return NS_ERROR_FAILURE;

    return i->BeginUpdateBackground(aRect, aCtx);
}