[Frame Timing]

Hi all,
Here are a few Web Platform tests for the Frame TIming API.

I understand that Mozilla, Chrome and IE have all pretty much decided to
gate Frame Timing on the Performance Observer spec, so some of the details
of the calls will change, but this is what we've been testing Chrome's
implementation against.

Any feedback would be appreciated!

Thanks,
-Mike


https://github.com/w3c/web-platform-tests/pull/1894

https://critic.hoppipolla.co.uk/r/5251