Revise use_system_harfbuzz logic

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 b370348a9fb2e750903ca80d13be406973f16722..5a4376f5dad4075e94b6816eabd81840285d6ff9 100644
--- a/third_party/harfbuzz-ng/BUILD.gn
+++ b/third_party/harfbuzz-ng/BUILD.gn
@@ -13,20 +13,7 @@ import("//build/config/linux/pkg_config.gni")
 # don't want to bloat the binary more by including another copy.
 
 declare_args() {
-  # Since version 1.31.0, pangoft2 which we depend on pulls in harfbuzz
-  # anyways. However, we want to have control of the version of harfbuzz
-  # we use, so don't use system harfbuzz for official builds, unless we
-  # are building for chrome os, where we have the system harfbuzz under
-  # control as well. We also do not want to use the system harfbuzz
-  # when cross-compiling for ARM.
-  use_system_harfbuzz = is_linux && (is_chromeos || (!is_official_build &&
-                                                     current_cpu != "arm")) &&
-                        exec_script(pkg_config_script,
-                                    pkg_config_args + [
-                                          "--atleast-version=1.31.0",
-                                          "pangoft2",
-                                        ],
-                                    "value")
+  use_system_harfbuzz = is_linux && target_os != "fnl"

[jamesr, 2015/10/21 00:25:47]

we should make an is_fnl as well (the is_linux, etc, things are the same as
target_os = checks but faster since they are bool checks instead of string
compares)

[cdotstout, 2015/10/21 00:35:53]

There already is.

 }
 
 if (use_system_harfbuzz) {