Planning an origin trial for long animation frames

[Noam Rosenthal]

Hi! I'm planning to start an OT for long animation frames:

https://chromestatus.com/feature/6118675067699200

It's been approved for experimentation and the code is there for the M115 branch.

Going through the motions in https://www.chromium.org/blink/origin-trials/running-an-origin-trial/#what-is-the-actual-process-to-run-an-origin-trial, please let me know if I'm missing anything!

Thanks

Noam