Remove HangoutsPrivate API

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 27 matching lines @@
       'developer_private.idl',
       'dial.idl',
       'downloads.idl',
       'downloads_internal.idl',
       'easy_unlock_private.idl',
       'experience_sampling_private.json',
       'feedback_private.idl',
       'file_system.idl',
       'font_settings.json',
       'gcm.json',
-      'hangouts_private.idl',
       'history.json',
       'hotword_private.idl',
       'i18n.json',
       'identity.idl',
       'identity_private.idl',
       'image_writer_private.idl',
       'inline_install_private.idl',
       'instance_id.json',
       'language_settings_private.idl',
       'launcher_page.idl',
@@ skipping 142 matching lines @@
           '<@(webrtc_schema_files)',
         ],
       }],
     ],
     'cc_dir': 'chrome/common/extensions/api',
     'root_namespace': 'extensions::api::%(namespace)s',
     'bundle_name': 'Chrome',
     'impl_dir_': 'chrome/browser/extensions/api',
   },
 }