Options: Remove the hidden class, since we override the hidden attribute to set

chrome/browser/resources/options/about_page.js

Index: chrome/browser/resources/options/about_page.js
diff --git a/chrome/browser/resources/options/about_page.js b/chrome/browser/resources/options/about_page.js
index a59d4b2efc99cf967cf353d8354ceb87faff6d96..00832696c9f35a2d9655db2de490bd27e12337b0 100644
--- a/chrome/browser/resources/options/about_page.js
+++ b/chrome/browser/resources/options/about_page.js
@@ -54,8 +54,8 @@ cr.define('options', function() {
       };
 
       $('moreInfoButton').onclick = function(event) {
-        $('aboutPageLessInfo').classList.add('hidden');
-        $('aboutPageMoreInfo').classList.remove('hidden');
+        $('aboutPageLessInfo').hidden = true;
+        $('aboutPageMoreInfo').hidden = false;
       };
 
       if (!AccountsOptions.currentUserIsOwner()) {