Revert "Enable chrome.automation.getDesktop on all aura platforms."

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 920 matching lines @@
       'browser/extensions/api/messaging/native_messaging_host_manifest_unittest.cc',
       'browser/extensions/api/messaging/native_messaging_policy_handler_unittest.cc',
     ],
     'chrome_unit_tests_ash_sources': [
       'browser/media/desktop_media_list_ash_unittest.cc',
       'browser/signin/signin_error_notifier_ash_unittest.cc',
       'browser/sync/sync_error_notifier_ash_unittest.cc',
       # Ash implies the app list is enabled (only disabled on mobile).
       'browser/ui/app_list/search/app_search_provider_unittest.cc',
       'browser/ui/app_list/search/history_unittest.cc',
-      'browser/ui/ash/accessibility/ax_tree_source_aura_unittest.cc',
+      'browser/ui/ash/accessibility/ax_tree_source_ash_unittest.cc',
       'browser/ui/ash/chrome_screenshot_grabber_unittest.cc',
       'browser/ui/ash/ime_controller_chromeos_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/session_state_delegate_chromeos_unittest.cc',
       'browser/ui/ash/window_positioner_unittest.cc',
       'browser/ui/window_sizer/window_sizer_ash_unittest.cc',
@@ skipping 1835 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }