Rename is_chromeos in chrome/src.

components/signin/core/browser/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.
 
 static_library("browser") {
   sources = [
     "about_signin_internals.cc",
     "about_signin_internals.h",
     "account_fetcher_service.cc",
     "account_fetcher_service.h",
@@ skipping 58 matching lines @@
     "//third_party/icu",
     "//components/content_settings/core/browser",
     "//components/content_settings/core/common",
     "//components/google/core/browser",
     "//components/invalidation/public",
     "//components/keyed_service/core",
     "//components/os_crypt",
     "//components/webdata/common",
   ]
 
-  if (is_chromeos) {
+  if (is_chromeos_ui) {
     sources -= [ "signin_manager.cc" ]
   }
 
   if (is_android) {
     sources -= [
       "child_account_info_fetcher_impl.cc",
       "child_account_info_fetcher_impl.h",
     ]
     deps += [ "android:jni_headers" ]
   }
@@ skipping 12 matching lines @@
     "fake_signin_manager.h",
     "test_signin_client.cc",
     "test_signin_client.h",
   ]
 
   deps = [
     ":browser",
     "//testing/gtest",
   ]
 }