function set_content_manager($manager)
 {
     $this->manager = $manager;
     $manager->recognized_extensions = array();
     $this->shim = new VimeoShim();
     if ($manager->get_value('entry_id')) {
         $this->displayer_chrome = new VimeoSizeSwitchDisplayerChrome();
         $this->displayer_chrome->set_media_work(new entity($manager->get_value('id')));
     }
     $this->original_entry_id = $manager->get_value('entry_id');
     $this->recognized_extensions = VimeoShim::get_recognized_extensions();
 }