GN bootstrap fixes:

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 97 matching lines @@
   } else if (is_ios) {
     safe_browsing_mode = 0
   } else {
     safe_browsing_mode = 1
   }
 
   # Set to true make a build that disables activation of field trial tests
   # specified in testing/variations/fieldtrial_testing_config_*.json.
   # Note: this setting is ignored if is_chrome_branded.
   fieldtrial_testing_like_official_build = is_chrome_branded
+
+  use_cups = (is_desktop_linux || is_mac) && !is_chromecast

[tfarina, 2015/11/04 15:04:31]

was this required for the bootstrap fixes? If not, I would suggest doing it in a
separate CL.

[Paweł Hajdan Jr., 2015/11/04 16:55:54]

Yes, this makes bootstrap possible in an environment where cups is unavailable.

 }
 
 # Additional dependent variables -----------------------------------------------
 
 # Set the version of CLD.
 #   1: (DEPRECATED! See http://crbug.com/528305 for info) Use only CLD1.
 #   2: Use only CLD2.
 cld_version = 2
 
 # libudev usage. This currently only affects the content layer.
@@ skipping 31 matching lines @@
 disable_ftp_support = is_ios
 
 enable_web_speech = !is_android && !is_ios
 
 use_dbus = is_linux && !is_chromecast
 
 enable_extensions = !is_android && !is_ios
 
 enable_task_manager = !is_ios && !is_android
 
-use_cups = (is_desktop_linux || is_mac) && !is_chromecast
-
 enable_themes = !is_android && !is_ios
 
 # TODO(scottmg) remove this when we've fixed printing.
 win_pdf_metafile_for_printing = true
 
 # Whether we are using the rlz library or not.  Platforms like Android send
 # rlz codes for searches but do not use the library.
 enable_rlz_support = is_win || is_mac || is_ios || is_chromeos
 enable_rlz = is_chrome_branded && enable_rlz_support
 
@@ skipping 14 matching lines @@
 # Option controlling the use of GConf (the classic GNOME configuration
 # system).
 use_gconf = is_linux && !is_chromeos && !is_chromecast
 
 # Whether to back up data before sync.
 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