add customized printing setting for headless

components/resources/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("//printing/features/features.gni")
 import("//tools/grit/grit_rule.gni")
 import("//third_party/brotli/brotli.gni")
 
 about_credits_file = "$target_gen_dir/about_credits.html"
 about_credits_file_bro = "$target_gen_dir/about_credits.bro"
@@ skipping 13 matching lines @@
   outputs = [
     "grit/components_resources.h",
     "components_resources.pak",
   ]
   output_dir = "$root_gen_dir/components"
 
   grit_flags = [
     "-E",
     "about_credits_file=" + rebase_path(about_credits_file_bro, root_build_dir),
   ]
-  defines = [ "enable_print_preview=$enable_print_preview" ]
+  defines = [
+    "enable_print_preview=$enable_print_preview",
+    "enable_basic_printing=$enable_basic_printing",

[Lei Zhang, 2017/05/04 07:29:36]

Flip these two around. This first.

[jzfeng, 2017/05/05 02:41:33]

Done.

+  ]
 
   deps = [
     ":compressed_about_credits",
   ]
 }
 
 grit("components_scaled_resources") {
   source = "components_scaled_resources.grd"
 
   # TODO(hashimoto): Remove this line.
@@ skipping 31 matching lines @@
   ]
 
   args = [
     "--target-os=$target_os",
     "--depfile",
     rebase_path(depfile, root_build_dir),
     "credits",
     rebase_path(about_credits_file, root_build_dir),
   ]
 }