Re: [page-visibility-tests] Added EventHandler definition (#5204)

Notifying @igrigorik and @toddreifsteck. *([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/5204#issuecomment-288534252

Received on Wednesday, 22 March 2017 20:48:16 UTC