Enable accessibility testing for the bookmark browser test.

chrome/chrome_tests_unit.gypi

 # Copyright 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.
 {
   'variables': {
     'chrome_unit_tests_sources': [
       '../components/autofill/content/renderer/test_password_autofill_agent.cc',
       '../components/autofill/content/renderer/test_password_autofill_agent.h',
       '../components/autofill/content/renderer/test_password_generation_agent.cc',
       '../components/autofill/content/renderer/test_password_generation_agent.h',
@@ skipping 1679 matching lines @@
         'browser/ui/website_settings/mock_permission_bubble_request.cc',
         'browser/ui/website_settings/mock_permission_bubble_request.h',
         'browser/ui/webui/signin/login_ui_test_utils.cc',
         'browser/ui/webui/signin/login_ui_test_utils.h',
         'renderer/chrome_mock_render_thread.cc',
         'renderer/chrome_mock_render_thread.h',
         'renderer/safe_browsing/mock_feature_extractor_clock.cc',
         'renderer/safe_browsing/mock_feature_extractor_clock.h',
         'renderer/safe_browsing/test_utils.cc',
         'renderer/safe_browsing/test_utils.h',
+        'test/base/accessibility_test_helper.cc',
+        'test/base/accessibility_test_helper.h',
         'test/base/chrome_process_util.cc',
         'test/base/chrome_process_util.h',
         'test/base/chrome_process_util_mac.cc',
         'test/base/chrome_render_view_host_test_harness.cc',
         'test/base/chrome_render_view_host_test_harness.h',
         'test/base/chrome_test_launcher.cc',
         'test/base/chrome_test_launcher.h',
         'test/base/chrome_test_suite.cc',
         'test/base/chrome_test_suite.h',
         'test/base/chrome_unit_test_suite.cc',
@@ skipping 1037 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }