Remove chrome/ code to handle App Notifications

chrome/common/extensions/api/api.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.
 
 {
   'targets': [
     {
       'target_name': 'api',
       'type': 'static_library',
       'sources': [
@@ skipping 22 matching lines @@
           'context_menus.json',
           'cookies.json',
           'debugger.json',
           'developer_private.idl',
           'dial.idl',
           'downloads.idl',
           'echo_private.json',
           'downloads_internal.idl',
           'events.json',
           'experimental_accessibility.json',
-          'experimental_app.json',
           'experimental_discovery.idl',
           'experimental_dns.idl',
           'experimental_history.json',
           'experimental_identity.idl',
           'experimental_idltest.idl',
           'experimental_infobars.json',
           'experimental_media_galleries.idl',
           'experimental_power.json',
           'experimental_record.json',
           'experimental_system_info_cpu.idl',
@@ skipping 57 matching lines @@
         ['OS!="chromeos"', {
           'schema_files!': [
             'file_browser_handler_internal.json',
             'rtc_private.idl',
           ],
         }],
       ],
     },
   ],
 }