Rename is_chromeos in chrome/src.

content/browser/BUILD.gn

Index: content/browser/BUILD.gn
diff --git a/content/browser/BUILD.gn b/content/browser/BUILD.gn
index a46ca440c61fa7e45a692fd4c97e1f4f8bf2adc1..42e3aea3d940e94c03885efd77433baac2f7095a 100644
--- a/content/browser/BUILD.gn
+++ b/content/browser/BUILD.gn
@@ -310,10 +310,10 @@ source_set("browser") {
   # Dealing with power_save_blocker_{x11,ozone}.cc is a little complicated
   # given the interaction between os_chromeos and the feature flags for X11 and
   # ozone, so do it all in one spot.
-  if (is_chromeos || !use_ozone) {
+  if (is_chromeos_ui || !use_ozone) {
     sources -= [ "power_save_blocker_ozone.cc" ]
   }
-  if (is_chromeos || !use_x11) {
+  if (is_chromeos_ui || !use_x11) {
     sources -= [ "power_save_blocker_x11.cc" ]
   }
 
@@ -322,7 +322,7 @@ source_set("browser") {
   if (is_android) {
     sources -= [ "geolocation/wifi_data_provider_common.cc" ]
   }
-  if (is_chromeos || (is_linux && !use_dbus)) {
+  if (is_chromeos_ui || (is_linux && !use_dbus)) {
     sources -= [ "geolocation/wifi_data_provider_linux.cc" ]
   }
   if (is_linux && use_dbus) {
@@ -397,7 +397,7 @@ source_set("browser") {
     ]
   }
 
-  if (is_chromeos) {
+  if (is_chromeos_ui) {
     sources -= [ "device_sensors/data_fetcher_shared_memory_default.cc" ]
     deps += [
       "//chromeos",