Settings: About: Fix restart and powerwash button visibility

chrome/browser/resources/settings/about_page/about_page.js

 // Copyright 2016 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.
 
 /**
  * @fileoverview 'settings-about-page' contains version and OS related
  * information.
  */
 
 Polymer({
@@ skipping 48 matching lines @@
     showButtonContainer_: Boolean,
 
     /** @private */
     showRelaunch_: Boolean,
 
 // <if expr="chromeos">
     /** @private */
     showRelaunchAndPowerwash_: {
       type: Boolean,
       computed: 'computeShowRelaunchAndPowerwash_(' +
-          'currentUpdateStatusEvent_, targetChannel_)',
+          'currentUpdateStatusEvent_, targetChannel_, currentChannel_)',
     },
 
     /** @private */
     showCheckUpdates_: {
       type: Boolean,
       computed: 'computeShowCheckUpdates_(' +
           'currentUpdateStatusEvent_, hasCheckedForUpdates_)',
     },
 
     /** @private {!Map<string, string>} */
@@ skipping 369 matching lines @@
     });
   },
 
 // <if expr="_google_chrome">
   /** @private */
   onReportIssueTap_: function() {
     this.aboutBrowserProxy_.openFeedbackDialog();
   },
 // </if>
 });