function getChromeInstallationsSafe() {
  if (process.env.LHCITEST_IGNORE_CHROME_INSTALLATIONS) return [];

  try {
    return ChromeLauncher.getInstallations();
  } catch (err) {
    return [];
  }
}
ChromeLauncher has an annoying API that *throws* instead of returning an empty array.
Also enables testing of environments that don't have Chrome globally installed in tests.

@return {string[]}