Allow platform apps to add themselves to the Action Box.

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 37 matching lines @@
           'experimental_system_info_storage.idl',
           'file_browser_handler_internal.json',
           'file_system.idl',
           'font_settings.json',
           'history.json',
           'i18n.json',
           'management.json',
           'media_galleries.idl',
           'media_galleries_private.idl',
           'page_capture.json',
+          'page_launcher.idl',
           'permissions.json',
           'push_messaging.idl',
           'rtc_private.idl',
           'serial.idl',
           'socket.idl',
           'storage.json',
           'sync_file_system.idl',
           'system_indicator.idl',
           'system_info_display.idl',
           'tab_capture.idl',
@@ skipping 16 matching lines @@
         ['OS!="chromeos"', {
           'schema_files!': [
             'file_browser_handler_internal.json',
             'rtc_private.idl',
           ],
         }],
       ],
     },
   ],
 }