function extraGlobals () {
  if (typeof process === 'object' && typeof process.version === 'string') {
    var parts = process.version.split('.');
    var nodeVersion = parts.reduce(function (a, v) {
      return a << 8 | v;
    });

    // 'errno' was renamed to process._errno in v0.9.11.

    if (nodeVersion < 0x00090B) {
      return ['errno'];
    }
  }

  return [];
}
Array of globals dependent on the environment.

@return {Array}
@api private