mash: Port TrayUpdateTest to AshTest

ash/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//ui/base/ui_features.gni")
 
 assert(use_aura)
@@ skipping 1210 matching lines @@
     "common/system/chromeos/power/tray_power_unittest.cc",
     "common/system/chromeos/screen_security/screen_tray_item_unittest.cc",
     "common/system/chromeos/session/logout_confirmation_controller_unittest.cc",
     "common/system/chromeos/session/tray_session_length_limit_unittest.cc",
     "common/system/chromeos/supervised/tray_supervised_user_unittest.cc",
     "common/system/date/date_view_unittest.cc",
     "common/system/ime/tray_ime_chromeos_unittest.cc",
     "common/system/tiles/tray_tiles_unittest.cc",
     "common/system/tray/system_tray_unittest.cc",
     "common/system/tray/tray_details_view_unittest.cc",
-    "common/system/update/tray_update_unittest.cc",
     "common/system/user/tray_user_unittest.cc",
 
     # TODO: convert to use AshTest http://crbug.com/654517.
     "common/wallpaper/wallpaper_controller_unittest.cc",
 
     # TODO: convert to use AshTest http://crbug.com/654524.
     "common/wm/overview/cleanup_animation_observer_unittest.cc",
     "dip_unittest.cc",
     "display/cursor_window_controller_unittest.cc",
     "display/display_change_observer_chromeos_unittest.cc",
@@ skipping 238 matching lines @@
   if (is_win) {
     configs -= [ "//build/config/win:console" ]
     configs += [ "//build/config/win:windowed" ]
     deps += [ "//sandbox" ]
   }
 
   if (is_chromeos) {
     deps += [ "//device/bluetooth" ]
   }
 }