Rename is_chromeos in chrome/src.

media/cast/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("//build/config/features.gni")
 import("//testing/test.gni")
 
 component("cast") {
   deps = [
     ":sender",
     ":receiver",
   ]
 }
 
 # Common code shared by all cast components.
@@ skipping 375 matching lines @@
     "test/utility/udp_proxy_main.cc",
   ]
 
   deps = [
     ":test_support",
     "//base",
     "//net",
   ]
 }
 
-if (is_linux && !is_chromeos) {
+if (is_linux && !use_cros_fe) {
   # TODO(GYP): Figure out which of these work and are needed on other platforms.
   test("cast_benchmarks") {
     sources = [
       "test/cast_benchmarks.cc",
       "test/fake_single_thread_task_runner.cc",
       "test/fake_single_thread_task_runner.h",
       "test/utility/test_util.cc",
       "test/utility/test_util.h",
     ]
 
@@ skipping 14 matching lines @@
       "test/utility/tap_proxy.cc",
     ]
 
     deps = [
       ":test_support",
       "//base",
       "//media",
     ]
   }
 }