Rename is_chromeos in chrome/src.

ui/views/BUILD.gn

Index: ui/views/BUILD.gn
diff --git a/ui/views/BUILD.gn b/ui/views/BUILD.gn
index ae64118d03f8e1bc2cb8269b81101268952474f8..86641a4e666170500b898f9b0751a9e148253eb6 100644
--- a/ui/views/BUILD.gn
+++ b/ui/views/BUILD.gn
@@ -55,10 +55,10 @@ component("views") {
     "//ui/views/resources",
   ]
 
-  if (use_x11 && !is_chromeos) {
+  if (use_x11 && !use_cros_fe) {
     deps += [ "//ui/display/util" ]
   }
-  if (is_linux && !is_chromeos) {
+  if (is_linux && !use_cros_fe) {
     sources -= [ "window/window_button_order_provider.cc" ]
     deps += [ "//ui/shell_dialogs" ]
   } else {
@@ -70,7 +70,7 @@ component("views") {
     ]
   }
 
-  if (is_chromeos) {
+  if (use_cros_fe) {
     sources -= [
       "linux_ui/status_icon_linux.cc",
       "linux_ui/status_icon_linux.h",
@@ -113,7 +113,7 @@ component("views") {
       "//ui/touch_selection",
       "//ui/wm",
     ]
-    if (!is_chromeos) {
+    if (!use_cros_fe) {
       sources += gypi_values.views_desktop_aura_sources
       if (use_x11) {
         sources += gypi_values.views_desktop_aura_x11_sources
@@ -171,7 +171,7 @@ static_library("test_support") {
       "//ui/aura:test_support",
       "//ui/wm",
     ]
-    if (use_x11 && !is_chromeos) {
+    if (use_x11 && !use_cros_fe) {
       sources += gypi_values.views_test_support_desktop_aura_x11_sources
     }
   }
@@ -252,14 +252,14 @@ test("views_unittests") {
       "//ui/touch_selection",
       "//ui/wm",
     ]
-    if (!is_chromeos) {
+    if (!use_cros_fe) {
       sources += gypi_values.views_unittests_desktop_aura_sources
       if (use_x11) {
         sources += gypi_values.views_unittests_desktop_aurax11_sources
       }
     }
   }
-  if (!is_chromeos) {
+  if (!use_cros_fe) {
     sources += gypi_values.views_unittests_desktop_sources
   }
   if (use_x11) {