Rename is_chromeos in chrome/src.

remoting/base/BUILD.gn

Index: remoting/base/BUILD.gn
diff --git a/remoting/base/BUILD.gn b/remoting/base/BUILD.gn
index a8f06a25e0e4fe5f1a5bfebb3c2e4ef061c7b457..9e012b11af443163f34755075a6eb81a18a7a932 100644
--- a/remoting/base/BUILD.gn
+++ b/remoting/base/BUILD.gn
@@ -2,6 +2,7 @@
 # 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("//remoting/remoting_srcs.gni")
 
 source_set("base") {
@@ -81,7 +82,7 @@ source_set("unit_tests") {
     "//third_party/webrtc/modules/desktop_capture",
   ]
 
-  if (is_win || is_mac || is_chromeos) {
+  if (is_win || is_mac || use_cros_fe) {
     deps += [ "//breakpad:client" ]
   }