Add the whispernet proxy.

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.
 
 {
   # All files are stored in these lists which are referenced in the target
   # below so that the GN build of this target can read in this dictionary and
   # duplicate the same logic without the lists getting out-of-sync. The GN
   # .gypi reader can not process conditions and does not know about targets,
   # etc., it just reads Python dictionaries.
@@ skipping 115 matching lines @@
       'media_player_private.json',
       'music_manager_private.idl',
       'principals_private.idl',
       'top_sites.json',
       'web_request_internal.json',
     ],
 
     # ChromeOS-specific schemas.
     'chromeos_schema_files': [
       'accessibility_features.json',
+      'copresence_private.idl',
       'diagnostics.idl',
       'enterprise_platform_keys.idl',
       'enterprise_platform_keys_internal.idl',
       'file_browser_handler_internal.json',
       'first_run_private.json',
       'log_private.idl',
       'wallpaper.json',
       'wallpaper_private.json',
       'webcam_private.idl',
     ],
@@ skipping 73 matching lines @@
       'conditions': [
         ['chromeos==1', {
           'dependencies': [
             '<(DEPTH)/chrome/chrome.gyp:drive_proto',
           ],
         }],
       ],
     },
   ],
 }