Re: [uievents-tests] Fix button event on mouse events. (#5710)

Notifying @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/5710#issuecomment-297562953

Received on Wednesday, 26 April 2017 22:47:03 UTC