Move printing defines to buildflag system.

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.
 
 # =============================================
 #   PLEASE DO NOT ADD MORE FLAGS TO THIS FILE
 # =============================================
 #
 # These flags are effectively global. Your feature flag should go near the
 # code it controls. Most of these items are here now because they control
@@ skipping 43 matching lines @@
     safe_browsing_mode = 2
   } 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
-
   # Enables Wi-Fi Display functionality
   # WARNING: This enables MPEG Transport Stream (MPEG-TS) encoding!
   enable_wifi_display = false
 
   # libudev usage. This currently only affects the content layer.
   use_udev = is_linux && !is_chromecast
 
   use_dbus = is_linux && !is_chromecast
 
   # Option controlling the use of GConf (the classic GNOME configuration
   # system).
   use_gconf = is_linux && !is_chromeos && !is_chromecast
 
   use_gio = is_linux && !is_chromeos && !is_chromecast
 
-  # Enable basic printing support and UI.
-  enable_basic_printing = !is_chromecast && !is_ios
-
-  # Enable printing with print preview. It does not imply
-  # enable_basic_printing. It's possible to build Chrome with preview only.
-  enable_print_preview = !is_android && !is_chromecast && !is_ios
-
   # Whether or not to use external popup menu.
   use_external_popup_menu = is_android || is_mac
 
   # Enable WebVR support by default on Android
   # Still requires command line flag to access API
   enable_webvr = is_android && is_component_build && is_debug &&
                  (current_cpu == "x86" || current_cpu == "x64" ||
                   current_cpu == "arm" || current_cpu == "arm64")
 }
 
@@ skipping 43 matching lines @@
 
 enable_configuration_policy = !is_ios
 
 enable_mac_keystone = is_mac && is_chrome_branded && is_official_build
 #
 # =============================================
 #   PLEASE DO NOT ADD MORE FLAGS TO THIS FILE
 # =============================================
 #
 # See comment at the top.