Move printing defines to buildflag system.

components/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")
+import("//printing/features/features.gni")
 import("//testing/test.gni")
 import("//tools/grit/repack.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
 if (is_ios) {
   import("//ios/build/config.gni")
 }
@@ skipping 386 matching lines @@
       "//components/password_manager/content/renderer",
       "//components/strings",
       "//components/tracing",
       "//content/shell:content_shell_lib",
       "//content/test:browsertest_support",
       "//content/test:test_support",
       "//device/bluetooth",
       "//device/geolocation",
       "//ipc:test_support",
       "//net:test_support",
+      "//printing/features",
       "//services/service_manager/public/cpp",
       "//testing/gmock",
       "//testing/gtest",
       "//ui/base",
     ]
 
     data_deps = [
       ":components_tests_pak",
       "//third_party/mesa:osmesa",
     ]
@@ skipping 48 matching lines @@
 
     deps = [
       "//base",
       "//components/test:test_support",
       "//components/visitedlink/browser",
       "//testing/perf",
       "//url",
     ]
   }
 }