Rename & rework is_chromeos

build/config/features.gni

Index: build/config/features.gni
diff --git a/build/config/features.gni b/build/config/features.gni
index e58a315b308a88e3093728c28fbb727835a90b5e..c27dd20a65b829b967213ad955102471c3d27fa8 100644
--- a/build/config/features.gni
+++ b/build/config/features.gni
@@ -47,7 +47,7 @@ enable_spellcheck = !is_android
 enable_pepper_cdms = enable_plugins && (is_linux || is_mac || is_win)
 
 # Enable basic printing support and UI.
-enable_basic_printing = !is_chromeos
+enable_basic_printing = !is_chromeos_ui
 
 # Enable printing with print preview. It does not imply
 # enable_basic_printing. It's possible to build Chrome with preview only.
@@ -112,7 +112,7 @@ enable_task_manager = !is_ios && !is_android
 
 use_cups = is_desktop_linux || is_mac
 
-enable_themes = !is_android && !is_chromeos
+enable_themes = !is_android && !is_chromeos_ui
 
 # TODO(scottmg) remove this when we've fixed printing.
 win_pdf_metafile_for_printing = true
@@ -125,7 +125,7 @@ enable_session_service = !is_android && !is_ios
 
 # Whether we are using the rlz library or not.  Platforms like Android send
 # rlz codes for searches but do not use the library.
-enable_rlz = is_chrome_branded && (is_win || is_mac || is_ios || is_chromeos)
+enable_rlz = is_chrome_branded && (is_win || is_mac || is_ios || is_chromeos_ui)
 
 enable_plugin_installation = is_win || is_mac