Fixed "Relaunch and Powerwash" button on a chrome://help page.

chrome/browser/resources/help/channel_change_page.js

 // Copyright 2013 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.
 
 cr.define('help', function() {
   var Page = cr.ui.pageManager.Page;
   var PageManager = cr.ui.pageManager.PageManager;
 
   /**
    * Encapsulated handling of the channel change overlay.
@@ skipping 177 matching lines @@
     },
 
     /**
      * Updates page UI according to device owhership policy.
      * @param {boolean} isEnterpriseManaged True if the device is
      *     enterprise managed
      * @private
      */
     updateIsEnterpriseManaged_: function(isEnterpriseManaged) {
       this.isEnterpriseManaged_ = isEnterpriseManaged;
-      help.HelpPage.updateChannelChangePageContainerVisibility();
     },
 
     /**
      * Updates name of the current channel, i.e. the name of the
      * channel the device is currently on.
      * @param {string} channel The name of the current channel
      * @private
      */
     updateCurrentChannel_: function(channel) {
      if (this.channelList_.indexOf(channel) < 0)
         return;
       this.currentChannel_ = channel;
       this.selectOption_(channel);
-      help.HelpPage.updateChannelChangePageContainerVisibility();
     },
 
     /**
      * Updates name of the target channel, i.e. the name of the
      * channel the device is supposed to be in case of a pending
      * channel change.
      * @param {string} channel The name of the target channel
      * @private
      */
     updateTargetChannel_: function(channel) {
       if (this.channelList_.indexOf(channel) < 0)
         return;
       this.targetChannel_ = channel;
-      help.HelpPage.updateChannelChangePageContainerVisibility();
     },
 
     /**
      * @return {boolean} True if the page is ready and can be
      *     displayed, false otherwise
      * @private
      */
     isPageReady_: function() {
       if (typeof this.isEnterpriseManaged_ == 'undefined')
         return false;
@@ skipping 18 matching lines @@
 
   ChannelChangePage.isPageReady = function() {
     return ChannelChangePage.getInstance().isPageReady_();
   };
 
   // Export
   return {
     ChannelChangePage: ChannelChangePage
   };
 });