Add ArcNotificationManager for new ARC notification

components/arc.gypi

 # Copyright 2015 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': [
     {
       # GN version: //components/arc
       'target_name': 'arc',
       'type': 'static_library',
@@ skipping 14 matching lines @@
         'arc/arc_bridge_bootstrap.h',
         'arc/arc_bridge_service.cc',
         'arc/arc_bridge_service.h',
         'arc/arc_bridge_service_impl.cc',
         'arc/arc_bridge_service_impl.h',
         'arc/arc_service_manager.cc',
         'arc/arc_service_manager.h',
         'arc/input/arc_input_bridge.h',
         'arc/input/arc_input_bridge_impl.cc',
         'arc/input/arc_input_bridge_impl.h',
+        'arc/notification/arc_notification_manager.cc',
+        'arc/notification/arc_notification_manager.h',
+        'arc/notification/arc_notification_item.cc',
+        'arc/notification/arc_notification_item.h',
         'arc/settings/arc_settings_bridge.cc',
         'arc/settings/arc_settings_bridge.h',
         'arc/power/arc_power_bridge.cc',
         'arc/power/arc_power_bridge.h',
       ],
     },
     {
       # GN version: //components/arc_test_support
       'target_name': 'arc_test_support',
       'type': 'static_library',
@@ skipping 26 matching lines @@
         'arc/common/arc_bridge.mojom',
         'arc/common/input.mojom',
         'arc/common/notifications.mojom',
         'arc/common/power.mojom',
         'arc/common/process.mojom',
         'arc/common/settings.mojom',
       ],
     },
   ],
 }