Alt text for About UI product label

chrome/browser/resources/help/help_page.js

Index: chrome/browser/resources/help/help_page.js
diff --git a/chrome/browser/resources/help/help_page.js b/chrome/browser/resources/help/help_page.js
index ab8e3df84b4656486a1bf5e2d5dd0a65ff0f0d15..050a98c0f492560fddbee95f088b6e87fea50c53 100644
--- a/chrome/browser/resources/help/help_page.js
+++ b/chrome/browser/resources/help/help_page.js
@@ -577,6 +577,15 @@ cr.define('help', function() {
       }
       $('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) {
@@ -646,6 +655,10 @@ cr.define('help', function() {
     HelpPage.getInstance().setBuildDate_(buildDate);
   };
 
+  HelpPage.setProductLabelText = function(text) {
+    HelpPage.getInstance().setProductLabelText_(text);
+  };
+
   // Export
   return {
     HelpPage: HelpPage