WebCrypto PRs in need of review

All,

I believe we are hoping to advance our specification on Monday. But there
are three PRs which have been open for 3 weeks, without any review.

Could someone take a look at these for me ?

These are the issues (the PRs are linked from the issues):

https://github.com/w3c/webcrypto/issues?utf8=%E2%9C%93&q=is%3Aissue%20is%3Aopen%20label%3A%22needs%20review%22

...Mark