Convert GN visibility variables to lists.

chrome/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/locales.gni")
 import("//build/config/ui.gni")
 import("//chrome/chrome_repack_locales.gni")
 import("//chrome/version.gni")
 
@@ skipping 301 matching lines @@
 
   # TODO(GYP) if (is_chrome_branded) {
   # ... copy default_apps from default_apps_list
 
   if (enable_hidpi) {
     deps += [ ":repack_chrome_200_percent" ]
   }
 }
 
 repack("packed_extra_resources") {
-  visibility = ":*"
+  visibility = [ ":*" ]
   sources = [
     "$root_gen_dir/chrome/browser_resources.pak",
     "$root_gen_dir/chrome/app/theme/chrome_unscaled_resources.pak",
     "$root_gen_dir/chrome/common_resources.pak",
     "$root_gen_dir/chrome/browser/resources/invalidations_resources.pak",
     "$root_gen_dir/chrome/browser/resources/memory_internals_resources.pak",
     "$root_gen_dir/chrome/browser/resources/net_internals_resources.pak",
     "$root_gen_dir/chrome/browser/resources/password_manager_internals_resources.pak",
     "$root_gen_dir/chrome/browser/resources/signin_internals_resources.pak",
     "$root_gen_dir/chrome/browser/resources/sync_internals_resources.pak",
@@ skipping 172 matching lines @@
 
 # GYP version: chrome/chrome_resources.gyp:chrome_strings
 group("strings") {
   deps = [
     "//chrome/app:chromium_strings",
     "//chrome/app:generated_resources",
     "//chrome/app:google_chrome_strings",
     "//chrome/app/resources:locale_settings",
   ]
 }