Remove OS_CHROMEOS from ui/ash code

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': [
       # histograms.xml is analyzed by AboutFlagsHistogramTest, so this
       # dependency is needed to make commit bots run unit_tests on
       # histograms.xml changes.
       '../tools/metrics/histograms/histograms.xml',
@@ skipping 1587 matching lines @@
       'browser/ui/webui/signin/signin_create_profile_handler_unittest.cc',
       'browser/ui/webui/signin/signin_supervised_user_import_handler_unittest.cc',
       'browser/ui/webui/signin/sync_confirmation_handler_unittest.cc',
       'browser/upgrade_detector_impl_unittest.cc',
     ],
     'chrome_unit_tests_app_list_sources': [
       'browser/ui/app_list/app_context_menu_unittest.cc',
       'browser/ui/app_list/app_list_positioner_unittest.cc',
       'browser/ui/app_list/app_list_service_mac_unittest.mm',
       'browser/ui/app_list/app_list_service_unittest.cc',
-      'browser/ui/app_list/app_list_shower_views_unittest.cc',
       'browser/ui/app_list/app_list_test_util.cc',
       'browser/ui/app_list/app_list_test_util.h',
       'browser/ui/app_list/extension_app_model_builder_unittest.cc',
       'browser/ui/app_list/model_pref_updater_unittest.cc',
       'browser/ui/app_list/profile_loader_unittest.cc',
       'browser/ui/app_list/search/app_search_provider_unittest.cc',
       'browser/ui/app_list/search/history_unittest.cc',
       'browser/ui/app_list/search/omnibox_result_unittest.cc',
       'browser/ui/app_list/search/suggestions/suggestions_search_provider_unittest.cc',
       'browser/ui/app_list/speech_auth_helper_unittest.cc',
@@ skipping 1371 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }