Alt text for About UI product label

chrome/browser/resources/help/help_page.js

 // Copyright 2014 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 About page. Called 'help' internally to avoid
@@ skipping 559 matching lines @@
      *     displayed, false otherwise.
      * @private
      */
     updateChannelChangerContainerVisibility_: function(visible) {
       if (this.isNewChannelSwitcherUI_()) {
         $('channel-changer').hidden = true;
         return;
       }
       $('channel-changer').hidden = !visible;
     },
+
+    /**
+     * Sets the product label's alt text.
+     * @param {string} text The text to use for the image.
+     * @private
+     */
+    setProductLabelText_: function(text) {
+      $('product-label').setAttribute('alt', text);
+    },
   };
 
   HelpPage.setUpdateStatus = function(status, message) {
     HelpPage.getInstance().setUpdateStatus_(status, message);
   };
 
   HelpPage.setProgress = function(progress) {
     HelpPage.getInstance().setProgress_(progress);
   };
 
@@ skipping 49 matching lines @@
   };
 
   HelpPage.setChannel = function(channel, isPowerwashAllowed) {
     HelpPage.getInstance().setChannel_(channel, isPowerwashAllowed);
   };
 
   HelpPage.setBuildDate = function(buildDate) {
     HelpPage.getInstance().setBuildDate_(buildDate);
   };
 
+  HelpPage.setProductLabelText = function(text) {
+    HelpPage.getInstance().setProductLabelText_(text);
+  };
+
   // Export
   return {
     HelpPage: HelpPage
   };
 });