navigator.storage

[annevk]

I'm not sure I entirely agree with https://github.com/WICG/storage-buckets/blob/gh-pages/explainer.md#expose-the-api-off-of-navigatorstoragebuckets.

I actually think estimate() should cover the entire origin, including buckets. And while persist() affects the default bucket, it also enables the non-default buckets to be persisted.

I agree that it mixes things a bit, but I think it would be nice if we could find a way out where there is a single entry point for storage management.