[iOS] Disable configuration_policy for iOS builds.

build/config/features.gni

 # 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.
 
 # This file contains Chrome-feature-related build flags (see ui.gni for
 # UI-related ones). These should theoretically be moved to the build files of
 # the features themselves.
 #
 # However, today we have many "bad" dependencies on some of these flags from,
 # e.g. base, so they need to be global to match the GYP configuration. Also,
@@ skipping 45 matching lines @@
 
   # Enables the Media Router.
   enable_media_router = !is_ios
 
   # Enables proprietary codecs and demuxers; e.g. H264, MOV, AAC, and MP3.
   # Android OS includes support for proprietary codecs regardless of building
   # Chromium or Google Chrome. We also ship Google Chrome and Chromecast with
   # proprietary codecs.
   proprietary_codecs = is_android || is_chrome_branded || is_chromecast
 
-  # TODO(GYP) This should be enabled on ios as well.
   enable_configuration_policy = !is_ios
 
   # Enables support for background apps.
   enable_background = !is_ios && !is_android
 
   enable_captive_portal_detection = !is_android && !is_ios
 
   # Enables use of the session service, which is enabled by default.
   # Android stores them separately on the Java side.
   enable_session_service = !is_android && !is_ios
@@ skipping 122 matching lines @@
 enable_pre_sync_backup = is_win || is_mac || (is_linux && !is_chromeos)
 
 # Enable WebVR support by default on Android
 # Still requires command line flag to access API
 enable_webvr = is_android
 
 use_gio = is_desktop_linux && !is_headless
 
 # Chrome OS: whether to use ARC instances. Disabled by default.
 enable_arc = false