XXX test gn format everything

components/autofill/core/browser/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.
 
 if (is_android) {
   import("//build/config/android/config.gni")
   autofill_enable_sync = !is_android_webview_build
 } else {
   autofill_enable_sync = true
 }
 
 config("autofill_browser_config") {
   if (autofill_enable_sync) {
     defines = [ "AUTOFILL_ENABLE_SYNC" ]
   }
 }
 
 # GYP version: components/autofill.gyp:autofill_regexes
 action("regexes") {
   visibility = [ "//components/autofill/*" ]
   script = "//build/escape_unicode.py"
 
   inputs = [
     "autofill_regex_constants.cc.utf8",
   ]
-  outputs = [
-    "$target_gen_dir/autofill_regex_constants.cc",
+  outputs = [ "$target_gen_dir/autofill_regex_constants.cc" ]
+
+  args = [
+    "-o",
+    rebase_path(target_gen_dir, root_build_dir),
   ]
-
-  args = [ "-o", rebase_path(target_gen_dir, root_build_dir) ]
   args += rebase_path(inputs, root_build_dir)
 }
 
 # GYP version: components/autofill.gyp:autofill_core_browser
 static_library("browser") {
   sources = [
     "address.cc",
     "address.h",
     "address_field.cc",
     "address_field.h",
@@ skipping 217 matching lines @@
     "//sync",
     "//sync:test_support_sync_api",
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/libphonenumber",
     "//third_party/libjingle",
     "//ui/base",
     "//url",
   ]
 }