mac: Remove dead NotificationUIManagerMac.

chrome/chrome_browser.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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 1407 matching lines @@
         'browser/notifications/notification_object_proxy.cc',
         'browser/notifications/notification_object_proxy.h',
         'browser/notifications/notification_options_menu_model.cc',
         'browser/notifications/notification_options_menu_model.h',
         'browser/notifications/notification_prefs_manager.cc',
         'browser/notifications/notification_prefs_manager.h',
         'browser/notifications/notification_system_observer.cc',
         'browser/notifications/notification_system_observer.h',
         'browser/notifications/notification_ui_manager.cc',
         'browser/notifications/notification_ui_manager.h',
-        'browser/notifications/notification_ui_manager_mac.mm',
-        'browser/notifications/notification_ui_manager_mac.h',
         'browser/notifications/sync_notifier/chrome_notifier_delegate.cc',
         'browser/notifications/sync_notifier/chrome_notifier_delegate.h',
         'browser/notifications/sync_notifier/chrome_notifier_service.cc',
         'browser/notifications/sync_notifier/chrome_notifier_service.h',
         'browser/notifications/sync_notifier/chrome_notifier_service_factory.cc',
         'browser/notifications/sync_notifier/chrome_notifier_service_factory.h',
         'browser/notifications/sync_notifier/image_holder.cc',
         'browser/notifications/sync_notifier/image_holder.h',
         'browser/notifications/sync_notifier/synced_notification.cc',
         'browser/notifications/sync_notifier/synced_notification.h',
@@ skipping 2414 matching lines @@
             'package_name': 'org/chromium/chrome/browser',
             'template_deps': ['browser/android/tab_load_status.h'],
           },
           'includes': [ '../build/android/java_cpp_template.gypi' ],
         },
       ],
      },
     ],
   ],
 }