Get rid of some <label for> misuse in browser_options.html

chrome/browser/resources/options/clear_browser_data_overlay.js

 // Copyright (c) 2012 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('options', function() {
   var Page = cr.ui.pageManager.Page;
   var PageManager = cr.ui.pageManager.PageManager;
 
   /**
    * ClearBrowserDataOverlay class
@@ skipping 102 matching lines @@
           if (footerFragments[i] == '|' && footerFragments[i + 2] == '|') {
             buttonId = 'open-content-settings-from-clear-browsing-data';
           } else if (footerFragments[i] == '#' &&
                      footerFragments[i + 2] == '#') {
             buttonId = 'open-search-engines-from-clear-browsing-data';
           }
         }
 
         if (buttonId != '') {
           var button = document.createElement('button');
-          button.setAttribute('id', buttonId);
-          button.setAttribute('class', 'link-button');
+          button.id = buttonId;
+          button.className = 'link-button';
           button.textContent = footerFragments[i + 1];
           footer.appendChild(button);
           i += 3;
         } else {
           var span = document.createElement('span');
           span.textContent = footerFragments[i];
           footer.appendChild(span);
           i += 1;
         }
       }
@@ skipping 123 matching lines @@
     var topmostVisiblePage = PageManager.getTopmostVisiblePage();
     if (topmostVisiblePage && topmostVisiblePage.name == 'clearBrowserData')
       PageManager.closeOverlay();
   };
 
   // Export
   return {
     ClearBrowserDataOverlay: ClearBrowserDataOverlay
   };
 });