Convert GN visibility variables to lists.

ui/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("//tools/grit/grit_rule.gni")
 import("//tools/grit/repack.gni")
 
 # GYP version: ui/resources/ui_resources.gyp:ui_resources
 group("resources") {
   deps = [
     ":ui_resources_grd",
     ":ui_unscaled_resources_grd",
     ":webui_resources_grd",
   ]
 }
 
 grit("ui_resources_grd") {
-  visibility = ":resources"
   source = "ui_resources.grd"
   outputs = [
     "grit/ui_resources.h",
     "grit/ui_resources_map.cc",
     "grit/ui_resources_map.h",
     "ui_resources_100_percent.pak",
     "ui_resources_200_percent.pak",
   ]
 }
 
 grit("ui_unscaled_resources_grd") {
-  visibility = ":resources"
   source = "ui_unscaled_resources.grd"
   outputs = [
     "grit/ui_unscaled_resources.h",
     "ui_unscaled_resources.rc",
   ]
 }
 
 grit("webui_resources_grd") {
-  visibility = ":resources"
   source = "../webui/resources/webui_resources.grd"
   outputs = [
     "grit/webui_resources.h",
     "grit/webui_resources_map.cc",
     "grit/webui_resources_map.h",
     "webui_resources.pak",
   ]
 }
 
 if (!is_mac) {
@@ skipping 17 matching lines @@
   }
 } else {
   group("ui_test_pak") {
     deps = [ ":repack_ui_test_pak" ]
   }
 }
 
 # GYP version: ui/resources/ui_resources.gyp:ui_test_pak
 repack("repack_ui_test_pak") {
   # Depend on ui_test_pak instead of this one.
-  visibility = ":ui_test_pak"
+  visibility = [ ":ui_test_pak" ]
 
   sources = [ 
     "$root_gen_dir/ui/resources/ui_resources_100_percent.pak",
     "$root_gen_dir/ui/resources/webui_resources.pak",
     "$root_gen_dir/ui/strings/app_locale_settings_en-US.pak",
     "$root_gen_dir/ui/strings/ui_strings_en-US.pak",
   ]
 
   output = "$root_out_dir/ui_test.pak"
 
   deps = [
     "//ui/resources",
     "//ui/strings",
   ]
 
   if (!is_mac) {
     deps += [ ":copy_ui_resources_100_percent" ]
   }
 }