Define getEnabledState for CloseWatcher instances

Fixes whatwg#10920. This was missed in 8029d4f.

Author: keithamus

source

@@ -83479,6 +83479,9 @@ dictionary <dfn dictionary>CloseWatcherOptions</dfn> {
      <li><p><i data-x="create-close-watcher-closeAction">closeAction</i> being to <span
      data-x="concept-event-fire">fire an event</span> named <code data-x="event-close">close</code>
      at <span>this</span>.</p></li>
+
+     <li><p><i data-x="close-watcher-get-enabled-state">getEnabledState</i> being to return
+     true.</li>
     </ul>
    </li>