scheme string - Custom schemes to be registered with options. 
privileges Object (optional)
standard boolean (optional) - Default false. 
secure boolean (optional) - Default false. 
bypassCSP boolean (optional) - Default false. 
allowServiceWorkers boolean (optional) - Default false. 
supportFetchAPI boolean (optional) - Default false. 
corsEnabled boolean (optional) - Default false. 
stream boolean (optional) - Default false. 
codeCache boolean (optional) - Enable V8 code cache for the scheme, only
works when standard is also set to true. Default false.