Convert GN visibility variables to lists.

chrome/app/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("//tools/grit/grit_rule.gni")
 
 # GYP version: chrome/chrome_resources.gyp:chrome_strings
 #              (generate_generated_resources action)
 grit("generated_resources") {
   source = "generated_resources.grd"
@@ skipping 54 matching lines @@
     "generated_resources_uk.pak",
     "generated_resources_vi.pak",
     "generated_resources_zh-CN.pak",
     "generated_resources_zh-TW.pak",
   ]
 }
 
 # GYP version: chrome/chrome_resources.gyp:chrome_strings_map
 action("make_generated_resources_map") {
   # Targets should depend on generated_resources_map instead.
-  visibility = ":generated_resources_map"
+  visibility = [ ":generated_resources_map" ]
 
   script = "//chrome/browser/metrics/variations/generate_resources_map.py"
 
   inputs = [ "$root_gen_dir/chrome/grit/generated_resources.h" ]
   outputs = [ "$root_gen_dir/chrome/generated_resources_map.cc" ]
 
   args = rebase_path(inputs, root_build_dir) +
       rebase_path(outputs, root_build_dir)
 
   deps = [ ":generated_resources" ]
@@ skipping 128 matching lines @@
     "chromium_strings_ta.pak",
     "chromium_strings_te.pak",
     "chromium_strings_th.pak",
     "chromium_strings_tr.pak",
     "chromium_strings_uk.pak",
     "chromium_strings_vi.pak",
     "chromium_strings_zh-CN.pak",
     "chromium_strings_zh-TW.pak",
   ]
 }