Re: [webmessaging-tests] Update webmessaging tests to match current HTML spec. (#4263)

Notifying @Ms2ger, @aogilvie, @jdm, and @zqzhang. *([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/4263#issuecomment-263747890

Received on Wednesday, 30 November 2016 00:44:09 UTC