Rename is_chromeos in chrome/src.

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 = [
@@ skipping 79 matching lines @@
   # Depend on ui_test_pak instead of this one.
   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",
   ]
 
-  if (is_chromeos) {
+  if (use_cros_fe) {
     sources += [
       "$root_gen_dir/ui/chromeos/resources/ui_chromeos_resources_100_percent.pak",
       "$root_gen_dir/ui/chromeos/strings/ui_chromeos_strings_en-US.pak",
     ]
   }
 
   output = "$root_out_dir/ui_test.pak"
 
   deps = [
     "//ui/resources",
     "//ui/strings",
   ]
 
   if (!is_ios) {
     deps += [ "//third_party/WebKit/public:resources_grit" ]
   }
 
   if (!is_mac) {
     deps += [ ":copy_ui_resources_100_percent" ]
   }
 
-  if (is_chromeos) {
+  if (use_cros_fe) {
     deps += [
       "//ui/chromeos/resources",
       "//ui/chromeos/strings",
     ]
   }
 
   if (toolkit_views) {
     deps += [ "//ui/views/resources" ]
     sources += [
       "$root_gen_dir/blink/public/resources/blink_resources.pak",
@@ skipping 16 matching lines @@
     "$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/en.lproj/locale.pak"
 
   deps = [
     "//ui/strings",
   ]
 }