Re: [service-workers-tests] Add wpt tests for async waitUntil(). (#4432)

Notifying @ehsan and @mkruisselbrink. *([Learn how reviewing works](https://github.com/w3c/web-platform-tests/blob/master/README.md#test-review).)*

View on GitHub: https://github.com/w3c/web-platform-tests/pull/4432#issuecomment-270144492

Received on Tuesday, 3 January 2017 15:47:13 UTC