Extend AXTreeSourceViews to handle aura::Window and views::Widget.

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.
 {
   'targets': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 1396 matching lines @@
         'browser/themes/theme_service_unittest.cc',
         'browser/themes/theme_syncable_service_unittest.cc',
         'browser/thumbnails/content_analysis_unittest.cc',
         'browser/thumbnails/content_based_thumbnailing_algorithm_unittest.cc',
         'browser/thumbnails/simple_thumbnail_crop_unittest.cc',
         'browser/thumbnails/thumbnail_service_unittest.cc',
         'browser/translate/translate_manager_render_view_host_unittest.cc',
         'browser/translate/translate_service_unittest.cc',
         'browser/ui/android/tab_model/tab_model_unittest.cc',
         'browser/ui/ash/ime_controller_chromeos_unittest.cc',
+        'browser/ui/ash/accessibility/ax_tree_source_views_unittest.cc',
         'browser/ui/ash/launcher/chrome_launcher_controller_unittest.cc',
         'browser/ui/ash/launcher/launcher_context_menu_unittest.cc',
         'browser/ui/ash/multi_user/multi_user_context_menu_chromeos_unittest.cc',
         'browser/ui/ash/multi_user/multi_user_notification_blocker_chromeos_unittest.cc',
         'browser/ui/ash/multi_user/multi_user_window_manager_chromeos_unittest.cc',
         'browser/ui/ash/screenshot_taker_unittest.cc',
         'browser/ui/ash/session_state_delegate_chromeos_unittest.cc',
         'browser/ui/ash/test_views_delegate_with_parent.cc',
         'browser/ui/ash/test_views_delegate_with_parent.h',
         'browser/ui/ash/window_positioner_unittest.cc',
@@ skipping 1407 matching lines @@
             'browser/ui/app_list/test/fake_profile_store.h',
             'browser/ui/app_list/test/fast_show_pickler_unittest.cc',
             'browser/ui/views/app_list/linux/app_list_linux_unittest.cc',
             'browser/ui/views/app_list/win/app_list_win_unittest.cc',
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }