Make chrome/browser/chromeos/accessibility compile on Athena with use_ash=0

ash/ash.gyp

 # Copyright (c) 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': {
     'chromium_code': 1,
     'grit_out_dir': '<(SHARED_INTERMEDIATE_DIR)/chrome',
     # These files lists are shared with the GN build.
     'ash_sources': [
@@ skipping 149 matching lines @@
       'ime/input_method_menu_item.cc',
       'ime/input_method_menu_item.h',
       'ime/input_method_menu_manager.cc',
       'ime/input_method_menu_manager.h',
       'ime/mode_indicator_view.cc',
       'ime/mode_indicator_view.h',
       'keyboard_uma_event_filter.cc',
       'keyboard_uma_event_filter.h',
       'magnifier/magnification_controller.cc',
       'magnifier/magnification_controller.h',
-      'magnifier/magnifier_constants.h',
       'magnifier/partial_magnification_controller.cc',
       'magnifier/partial_magnification_controller.h',
       'metrics/user_metrics_recorder.cc',
       'metrics/user_metrics_recorder.h',
       'multi_profile_uma.cc',
       'multi_profile_uma.h',
       'popup_message.cc',
       'popup_message.h',
       'root_window_controller.cc',
       'root_window_controller.h',
@@ skipping 1111 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'ash_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }