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 1677 matching lines @@
         'browser/ui/toolbar/recent_tabs_builder_test_helper.cc',
         'browser/ui/toolbar/recent_tabs_builder_test_helper.h',
         'browser/ui/toolbar/recent_tabs_sub_menu_model_unittest.cc',
         'browser/ui/toolbar/toolbar_model_unittest.cc',
         'browser/ui/toolbar/test_toolbar_model.cc',
         'browser/ui/toolbar/test_toolbar_model.h',
         'browser/ui/toolbar/wrench_icon_painter_unittest.cc',
         'browser/ui/toolbar/wrench_menu_model_unittest.cc',
         'browser/ui/views/accelerator_table_unittest.cc',
         'browser/ui/views/accessibility/accessibility_event_router_views_unittest.cc',
+        'browser/ui/views/accessibility/ax_tree_source_views_unittest.cc',
         'browser/ui/views/apps/shaped_app_window_targeter_unittest.cc',
         'browser/ui/views/autofill/autofill_dialog_views_unittest.cc',
         'browser/ui/views/bookmarks/bookmark_bar_view_unittest.cc',
         'browser/ui/views/bookmarks/bookmark_bubble_view_unittest.cc',
         'browser/ui/views/bookmarks/bookmark_context_menu_unittest.cc',
         'browser/ui/views/bookmarks/bookmark_editor_view_unittest.cc',
         'browser/ui/views/bookmarks/bookmark_menu_delegate_unittest.cc',
         'browser/ui/views/bookmarks/bookmark_bubble_view_unittest.cc',
         'browser/ui/views/bookmarks/bookmark_sync_promo_view_unittest.cc',
         'browser/ui/views/confirm_bubble_views_unittest.cc',
@@ skipping 1126 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'
 }