Add new extension API for VPN

chrome/common/extensions/api/schemas.gypi

 # Copyright 2014 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.
 
 {
   'sources': [
     '<@(schema_files)',
   ],
   'variables': {
     'main_schema_files': [
@@ skipping 100 matching lines @@
 
     # ChromeOS-specific schemas.
     'chromeos_schema_files': [
       'accessibility_features.json',
       'diagnostics.idl',
       'enterprise_platform_keys.idl',
       'enterprise_platform_keys_internal.idl',
       'file_browser_handler_internal.json',
       'first_run_private.json',
       'log_private.idl',
+      'vpn_provider.idl',
       'webcam_private.idl',
     ],
 
     # ChromeOS-specific schemas which have not been ported to Athena.
     'chromeos_non_athena_schema_files': [
       'wallpaper.json',
       'wallpaper_private.json',
     ],
 
     'webrtc_schema_files': [
@@ skipping 46 matching lines @@
         'schema_files': [
           '<@(webrtc_schema_files)',
         ],
       }],
     ],
     'cc_dir': 'chrome/common/extensions/api',
     'root_namespace': 'extensions::api::%(namespace)s',
     'impl_dir_': 'chrome/browser/extensions/api',
   },
 }