Rename is_chromeos in harfbuzz.

third_party/harfbuzz-ng/BUILD.gn

Index: third_party/harfbuzz-ng/BUILD.gn
diff --git a/third_party/harfbuzz-ng/BUILD.gn b/third_party/harfbuzz-ng/BUILD.gn
index 144130af1cab79d01df6bdfda2770fd898cc1c4a..2a35993a2016e5e3c2da31cef7df207854f82d5d 100644
--- a/third_party/harfbuzz-ng/BUILD.gn
+++ b/third_party/harfbuzz-ng/BUILD.gn
@@ -20,12 +20,12 @@ declare_args() {
   # we use, so don't use system harfbuzz unless we are building for
   # chrome os, where we have the system harfbuzz under control.
   use_system_harfbuzz =
-      is_linux && is_chromeos && exec_script(pkg_config_script,
-                                             pkg_config_args + [
-                                                   "--atleast-version=1.31.0",
-                                                   "pangoft2",
-                                                 ],
-                                             "value")
+      is_chromeos_ui && exec_script(pkg_config_script,
+                                    pkg_config_args + [
+                                          "--atleast-version=1.31.0",
+                                          "pangoft2",
+                                        ],
+                                    "value")
 }
 
 if (use_system_harfbuzz) {
@@ -184,7 +184,7 @@ if (use_system_harfbuzz) {
     # in the tree, all symbols pango needs must be included, or
     # pango uses mixed versions of harfbuzz and leads to crash.
     # See crbug.com/462689.
-    if (is_linux && use_pango && !is_chromeos && !is_official_build &&
+    if (is_linux && !is_chromeos_ui && use_pango && !is_official_build &&
         current_cpu != "arm" && current_cpu != "mipsel") {
       configs -= [ "//build/config/gcc:symbol_visibility_hidden" ]
       configs += [
@@ -201,7 +201,7 @@ if (use_system_harfbuzz) {
 
     # See also chrome/browser/ui/libgtk2ui/BUILD.gn which pulls this.
     config("pangoft2_link_hack") {
-      if (is_linux && use_pango && !is_chromeos && !is_official_build &&
+      if (is_linux && !is_chromeos_ui && use_pango && !is_official_build &&
           current_cpu != "arm" && current_cpu != "mipsel" &&
           !is_component_build) {
         # These symbols are referenced from libpangoft2, which will be