Show notifications on low disk space.

chrome/chrome_browser_chromeos.gypi

 # 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': {
     # These files lists are shared with the GN build.
     'browser_chromeos_sources': [
         # All .cc, .h, .m, and .mm files under browser/chromeos, except for tests
@@ skipping 1048 matching lines @@
         'browser/chromeos/ui/echo_dialog_view.cc',
         'browser/chromeos/ui/echo_dialog_view.h',
         'browser/chromeos/ui/focus_ring_controller.cc',
         'browser/chromeos/ui/focus_ring_controller.h',
         'browser/chromeos/ui/focus_ring_layer.cc',
         'browser/chromeos/ui/focus_ring_layer.h',
         'browser/chromeos/ui/idle_app_name_notification_view.cc',
         'browser/chromeos/ui/idle_app_name_notification_view.h',
         'browser/chromeos/ui/kiosk_external_update_notification.cc',
         'browser/chromeos/ui/kiosk_external_update_notification.h',
+        'browser/chromeos/ui/low_disk_notification.cc',
+        'browser/chromeos/ui/low_disk_notification.h',
         'browser/chromeos/ui/mobile_config_ui.cc',
         'browser/chromeos/ui/mobile_config_ui.h',
         'browser/chromeos/ui/screen_capture_notification_ui_chromeos.cc',
         'browser/chromeos/ui/screen_capture_notification_ui_chromeos.h',
         'browser/chromeos/ui_proxy_config.cc',
         'browser/chromeos/ui_proxy_config.h',
         'browser/chromeos/ui_proxy_config_service.cc',
         'browser/chromeos/ui_proxy_config_service.h',
         'browser/chromeos/upgrade_detector_chromeos.cc',
         'browser/chromeos/upgrade_detector_chromeos.h',
@@ skipping 289 matching lines @@
         'browser/chromeos/attestation/attestation_signed_data.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/chromeos/attestation',
         'proto_out_dir': 'chrome/browser/chromeos/attestation',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }