WebUI: add functional test for text_defaults.css

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': {
     'build_angle_deqp_tests%': 0,
     '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',
@@ skipping 996 matching lines @@
       'test/data/webui/settings/basic_page_browsertest.js',
       'test/data/webui/settings/bluetooth_page_browsertest_chromeos.js',
       'test/data/webui/settings/change_picture_browsertest_chromeos.js',
       'test/data/webui/settings/cr_settings_browsertest.js',
       'test/data/webui/settings/easy_unlock_browsertest_chromeos.js',
       'test/data/webui/settings/languages_page_browsertest.js',
       'test/data/webui/settings/on_startup_browsertest.js',
       'test/data/webui/settings/settings_page_browsertest.js',
       'test/data/webui/settings/settings_passwords_section_browsertest.js',
       'test/data/webui/settings/settings_subpage_browsertest.js',
+      'test/data/webui/text_defaults_browsertest.js',
       'test/data/webui/webui_resource_async_browsertest.js',
     ],
     # TODO(rockot) bug 505926: These should be moved to a target in
     # //extensions but have old dependencies on chrome files. The chrome
     # dependencies should be removed and these moved to the
     # extensions_browsertests target.
     'chrome_interactive_ui_test_extensions_sources': [
       '../extensions/browser/app_window/app_window_interactive_uitest.cc',
     ],
     'chrome_interactive_ui_test_sources': [
@@ skipping 2519 matching lines @@
             'browser',
           ],
           'sources': [
             'tools/service_discovery_sniffer/service_discovery_sniffer.cc',
             'tools/service_discovery_sniffer/service_discovery_sniffer.h',
           ],
         }]
     }],
   ],  # 'conditions'
 }