Mozilla reftest export 20170406 (#5415)

This is an export of reftests from Mozilla's repository to the web-platform-tests repo (and the first one since the CSSWG tests moved into the web-platform-tests repo).

View on GitHub: https://github.com/w3c/web-platform-tests/pull/5415

Received on Thursday, 6 April 2017 22:53:16 UTC