Rename is_chromeos in chrome/src.

device/hid/BUILD.gn

Index: device/hid/BUILD.gn
diff --git a/device/hid/BUILD.gn b/device/hid/BUILD.gn
index 4a6a1b29f7189644643e36b3bd804301e3f0d8a9..f094e7660d4a9720348eb5c9c71cfdb7fc73ca29 100644
--- a/device/hid/BUILD.gn
+++ b/device/hid/BUILD.gn
@@ -2,6 +2,8 @@
 # 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")
+
 source_set("hid") {
   sources = [
     "device_monitor_linux.cc",
@@ -52,7 +54,7 @@ source_set("hid") {
   if (is_linux) {
     deps += [ "//device/udev_linux" ]
   }
-  if (is_chromeos) {
+  if (use_cros_fe) {
     deps += [ "//chromeos" ]
   }
 }