[Chromoting] Add ability to enable/disable GDrive support per-app in gyp.

remoting/remoting_webapp_files.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.
 
 {
   'variables': {
     'remoting_webapp_info_files': [
       'resources/chromoting16.webp',
       'resources/chromoting48.webp',
       'resources/chromoting128.webp',
@@ skipping 39 matching lines @@
       'webapp/crd/js/client_session.js',
       'webapp/crd/js/clipboard.js',
       'webapp/crd/js/hangout_session.js',
       'webapp/crd/js/session_connector.js',
       'webapp/crd/js/session_connector_impl.js',
       'webapp/crd/js/smart_reconnector.js',
       'webapp/crd/js/video_frame_recorder.js',
     ],
     # Remoting core JavaScript files.
     'remoting_webapp_js_core_files': [
+      'webapp/base/js/app_features.js',
       'webapp/base/js/application.js',
       'webapp/base/js/base.js',
       'webapp/base/js/ipc.js',
       'webapp/base/js/platform.js',
       'webapp/crd/js/apps_v2_migration.js',
       'webapp/crd/js/error.js',
       'webapp/crd/js/event_handlers.js',
       'webapp/crd/js/plugin_settings.js',
       # TODO(garykac) Split out UI client stuff from remoting.js.
       'webapp/crd/js/remoting.js',
@@ skipping 289 matching lines @@
       'webapp/crd/manifest.json.jinja2',
       '<(remoting_webapp_template_main)',
       '<(remoting_webapp_template_wcs_sandbox)',
       '<(remoting_webapp_template_background)',
       '<@(remoting_webapp_template_files)',
       '<@(remoting_webapp_crd_js_files)',
     ],
 
   },
 }