Re: [web-animations-tests] Implement KeyframeEffect::SetComposite(). r=boris,smaug (#4495)

Notifying @birtles. *([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/4495#issuecomment-270149755

Received on Tuesday, 3 January 2017 16:06:53 UTC