Add chrome/browser/ui to the GN build.

printing/BUILD.gn

 # 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.
 
+import("//build/config/features.gni")
 import("//build/config/ui.gni")
 if (is_mac) {
   import("//build/config/mac/mac_sdk.gni")
 }
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
-use_cups = ((is_linux && !is_chromeos) || is_mac)
-
 component("printing") {
   sources = [
     "backend/print_backend.cc",
     "backend/print_backend.h",
     "backend/print_backend_consts.cc",
     "backend/print_backend_consts.h",
     "backend/print_backend_dummy.cc",
     "backend/printing_info_win.cc",
     "backend/printing_info_win.h",
     "emf_win.cc",
@@ skipping 223 matching lines @@
   #  'type': 'none',
   #  'variables': {
   #    'java_in_dir': '../printing/android/java',
   #  },
   #  'dependencies': [
   #    '../base/base.gyp:base_java',
   #  ],
   #  'includes': [ '../build/java.gypi'  ],
   #}
 }