This is very confusing as seen in #12974 or #12906. My suggestion would be "legacy."
done();
    });
  });
});
gulp.task(
  "lint-chromium",
  gulp.series("default_preferences", function (done) {
    console.log();
    console.log("### Checking supplemental Chromium files");
    if (
      !checkChromePreferencesFile(
        "extensions/chromium/preferences_schema.json",
        "build/default_preferences.json"
      )
    ) {
      done(new Error("chromium/preferences_schema is not in sync."));
      return;
    }
    done();
  })
);
gulp.task(
  "dev-sandbox",
  gulp.series(
    function scripting() {
      const defines = builder.merge(DEFINES, { GENERIC: true, TESTING: true });
      return createTemporaryScriptingBundle(defines, {
        disableVersionInfo: true,
      });
    },