Rename is_chromeos in chrome/src.

content/test/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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/module_args/v8.gni")
 import("//testing/test.gni")
@@ skipping 583 matching lines @@
       "//third_party/libjingle:libpeerconnection",
       "//third_party/webrtc/modules/video_capture",
     ]
 
     if (is_linux || is_mac || is_win) {
       sources +=
           [ "../browser/media/capture/desktop_capture_device_unittest.cc" ]
       deps += [ "//third_party/webrtc/modules/desktop_capture" ]
     }
 
-    if (is_chromeos) {
+    if (use_cros_fe) {
       sources +=
           [ "../browser/media/capture/desktop_capture_device_aura_unittest.cc" ]
     }
   } else {
     if (enable_plugins) {
       # This file is added only when plugins are enabled, but we don't want it
       # unless webrtc is also enabled.
       sources -=
           [ "../renderer/media/webrtc/video_destination_handler_unittest.cc" ]
     }
@@ skipping 17 matching lines @@
   if (is_win) {
     deps += [ "//third_party/iaccessible2" ]
   }
   if (is_mac) {
     # These flags are needed to run the test on Mac.
     # Search for comments about "xcode_settings" in chrome_tests.gypi.
     ldflags = [ "-Wl,-ObjC" ]
 
     deps += [ "//third_party/ocmock" ]
   }
-  if (is_chromeos) {
+  if (use_cros_fe) {
     sources -= [ "../browser/geolocation/wifi_data_provider_linux_unittest.cc" ]
     deps += [ "//chromeos" ]
   }
   if (is_android) {
     sources +=
         rebase_path(content_tests_gypi_values.content_unittests_android_sources,
                     ".",
                     "//content")
     sources -= [
       "../browser/geolocation/network_location_provider_unittest.cc",
@@ skipping 136 matching lines @@
       "//testing/gtest",
       "//third_party/WebKit/public:blink",
       "//ui/base",
       "//ui/gfx",
       "//ui/gfx/geometry",
       "//ui/gl",
       "//ui/gl:test_support",
     ]
   }
 }