CustomScheme 对象

• scheme 字符串 - 自定义的计划，可以被按选项注册。
• privileges Object (可选)
  • standard boolean (可选) -默认为false
  • secure boolean (可选) - 默认为false
  • bypassCSP boolean (可选) - 默认为false
  • allowServiceWorkers boolean (可选) - 默认为false
  • supportFetchAPI boolean (可选) - 默认为false
  • corsEnabled boolean (可选) - 默认为false
  • stream boolean (可选) - 默认为 false.
  • codeCache boolean (optional) - Enable V8 code cache for the scheme, only works when standard is also set to true. Default false.