Add unit tests for screen capture and share notification UI.

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',
   },
   'includes': [
@@ skipping 666 matching lines @@
         'shell/lock_view.cc',
         'shell/panel_window.cc',
         'shell/shell_delegate_impl.cc',
         'shell/shell_delegate_impl.h',
         'shell/toplevel_window.cc',
         'shell/widgets.cc',
         'shell/window_type_launcher.cc',
         'shell/window_watcher.cc',
         'shell/window_watcher_unittest.cc',
         'system/chromeos/network/network_state_notifier_unittest.cc',
+        'system/chromeos/screen_security/screen_tray_item_unittest.cc',
         'system/tray/system_tray_unittest.cc',
         'system/user/tray_user_unittest.cc',
         'system/web_notification/web_notification_tray_unittest.cc',
         'test/ash_test_helper_unittest.cc',
         'test/ash_unittests.cc',
         'tooltips/tooltip_controller_unittest.cc',
         'touch/touch_observer_hud_unittest.cc',
         'wm/activation_controller_unittest.cc',
         'wm/ash_activation_controller_unittest.cc',
         'wm/ash_native_cursor_manager_unittest.cc',
@@ skipping 164 matching lines @@
             'shell/cocoa/app-Info.plist',
           ],
           'xcode_settings': {
             'INFOPLIST_FILE': 'shell/cocoa/app-Info.plist',
           },
         }],
       ],
     },
   ],
 }