Add support for persistent file access in apps.

chrome/chrome_browser_extensions.gypi

 # Copyright (c) 2013 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_extensions',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 204 matching lines @@
         'browser/extensions/api/downloads_internal/downloads_internal_api.cc',
         'browser/extensions/api/downloads_internal/downloads_internal_api.h',
         'browser/extensions/api/execute_code_function.cc',
         'browser/extensions/api/execute_code_function.h',
         'browser/extensions/api/extension_action/extension_page_actions_api_constants.cc',
         'browser/extensions/api/extension_action/extension_page_actions_api_constants.h',
         'browser/extensions/api/file_handlers/app_file_handler_util.cc',
         'browser/extensions/api/file_handlers/app_file_handler_util.h',
         'browser/extensions/api/file_system/file_system_api.cc',
         'browser/extensions/api/file_system/file_system_api.h',
+        'browser/extensions/api/file_system/saved_files_service.cc',
+        'browser/extensions/api/file_system/saved_files_service.h',
+        'browser/extensions/api/file_system/saved_files_service_factory.cc',
+        'browser/extensions/api/file_system/saved_files_service_factory.h',
         'browser/extensions/api/font_settings/font_settings_api.cc',
         'browser/extensions/api/font_settings/font_settings_api.h',
         'browser/extensions/api/history/history_api.h',
         'browser/extensions/api/history/history_api.cc',
         'browser/extensions/api/i18n/i18n_api.cc',
         'browser/extensions/api/i18n/i18n_api.h',
         'browser/extensions/api/identity/experimental_identity_api.cc',
         'browser/extensions/api/identity/experimental_identity_api.h',
         'browser/extensions/api/identity/experimental_web_auth_flow.cc',
         'browser/extensions/api/identity/experimental_web_auth_flow.h',
@@ skipping 718 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/chromeos/contacts',
             'proto_out_dir': 'chrome/browser/chromeos/contacts',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],  # 'chromeos=1'
   ],  # 'conditions'
 }