Enable a11y audit for chrome://settings

chrome/chrome_tests.gypi

 # Copyright 2013 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.
 {
   'variables': {
     'chrome_browser_extensions_test_support_sources': [
       # A list of sources which is shared between different browser tests.
       'browser/apps/app_browsertest_util.cc',
       'browser/apps/app_browsertest_util.h',
       'browser/extensions/browsertest_util.cc',
@@ skipping 700 matching lines @@
       'browser/ui/webui/options/content_options_browsertest.js',
       'browser/ui/webui/options/content_settings_exception_area_browsertest.js',
       'browser/ui/webui/options/cookies_view_browsertest.js',
       'browser/ui/webui/options/edit_dictionary_browsertest.js',
       'browser/ui/webui/options/font_settings_browsertest.js',
       'browser/ui/webui/options/language_options_browsertest.js',
       'browser/ui/webui/options/language_options_dictionary_download_browsertest.js',
       'browser/ui/webui/options/manage_profile_browsertest.js',
       'browser/ui/webui/options/options_browsertest.cc',
       'browser/ui/webui/options/options_browsertest.js',
+      'browser/ui/webui/options/options_browsertest_base.js',
       'browser/ui/webui/options/options_ui_browsertest.cc',
       'browser/ui/webui/options/options_ui_browsertest.h',
       'browser/ui/webui/options/password_manager_browsertest.js',
       'browser/ui/webui/options/profile_settings_reset_browsertest.js',
       'browser/ui/webui/options/preferences_browsertest.cc',
       'browser/ui/webui/options/preferences_browsertest.h',
       'browser/ui/webui/options/search_engine_manager_browsertest.js',
       'browser/ui/webui/options/settings_app_browsertest.js',
       'browser/ui/webui/options/settings_format_browsertest.js',
       'browser/ui/webui/options/startup_page_list_browsertest.js',
@@ skipping 2492 matching lines @@
             ['enable_webrtc==1', {
               'dependencies': [
                 '../third_party/libjingle/libjingle.gyp:libjingle_webrtc'
               ]
             }],
           ],
         }]
     }],
   ],  # 'conditions'
 }