Rename & rework is_chromeos

build/config/ui.gni

Index: build/config/ui.gni
diff --git a/build/config/ui.gni b/build/config/ui.gni
index 3e37d2d5fcf4625bccb034edd106e3071ea191bf..1382d71d7088a6fd1a44570bfd1ae4a71074b599 100644
--- a/build/config/ui.gni
+++ b/build/config/ui.gni
@@ -14,7 +14,7 @@
 declare_args() {
   # Indicates if Ash is enabled. Ash is the Aura Shell which provides a
   # desktop-like environment for Aura. Requires use_aura = true
-  use_ash = is_win || is_chromeos
+  use_ash = is_win || is_chromeos_ui
 
   # Indicates if Ozone is enabled. Ozone is a low-level library layer for Linux
   # that does not require X11.
@@ -25,14 +25,14 @@ declare_args() {
 
   # Indicates if Aura is enabled. Aura is a low-level windowing library, sort
   # of a replacement for GDI or GTK.
-  use_aura = is_linux || use_ozone || is_win || is_chromeos || use_ash
+  use_aura = is_linux || use_ozone || is_win || is_chromeos_ui || use_ash
 
   # XInput2 multitouch support. Zero means disabled, nonzero indicates the
   # minimum XI2 version. For example, use_xi2_mt=2 means XI2.2 or above.
   use_xi2_mt = 2
 
   # True means the UI is built using the "views" framework.
-  toolkit_views = is_win || is_chromeos || use_aura
+  toolkit_views = is_win || is_chromeos_ui || use_aura
 }
 
 # Additional dependent variables -----------------------------------------------