web_dev_style: check webui browser tests as well.

chrome/browser/ui/webui/options/settings_format_browsertest.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.
 
 /**
  * TestFixture for testing the formatting of settings pages.
  * @extends {testing.Test}
  * @constructor
  */
 function SettingsFormatWebUITest() {}
@@ skipping 133 matching lines @@
 /**
  * Each radio button requires name and value properties.
  */
 TEST_F('SettingsFormatWebUITest', 'RadioButtonNameValueCheck', function() {
   var elements = document.querySelectorAll('input[type=radio]');
   for (var i = 0; i < elements.length; i++) {
     var element = elements[i];
     if (!element.name)
       this.fail('MISSING_RADIO_BUTTON_NAME', element);
 
-    if (!element.getAttribute("value"))
+    if (!element.getAttribute('value'))
       this.fail('MISSING_RADIO_BUTTON_VALUE', element);
   }
 });