Rename is_chromeos in chrome/src.

crypto/BUILD.gn

 # Copyright (c) 2013 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/crypto.gni")
 import("//testing/test.gni")
 
 if (is_nacl) {
   component("crypto") {
     output_name = "crcrypto"  # Avoid colliding with OpenSSL's libcrypto.
     sources = [
       "random.cc",
       "random.h",
     ]
@@ skipping 300 matching lines @@
     "//base",
   ]
 
   if (!use_nss_certs) {
     sources -= [
       "scoped_test_nss_db.cc",
       "scoped_test_nss_db.h",
     ]
   }
 
-  if (!is_chromeos) {
+  if (!use_cros_fe) {
     sources -= [
       "scoped_test_nss_chromeos_user.cc",
       "scoped_test_nss_chromeos_user.h",
       "scoped_test_system_nss_key_slot.cc",
       "scoped_test_system_nss_key_slot.h",
     ]
   }
 }
 
 config("platform_config") {
@@ skipping 38 matching lines @@
       public_configs += [ "//third_party/nss:system_nss_no_ssl_config" ]
     } else {
       # Non-Linux platforms use the hermetic NSS from the tree.
       public_deps = [
         "//third_party/nss:nspr",
         "//third_party/nss:nss",
       ]
     }
   }
 }