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Created attachment 443955 [details] Patch
Created attachment 444043 [details] Patch
Created attachment 444084 [details] Patch
Comment on attachment 444084 [details] Patch r=me I think for most storage types we'll need to do migration more incrementally; but this storage type has not been used much, so one-shot seems fine.
Created attachment 444111 [details] Patch for landing
Committed r285746 (244205@main): <https://commits.webkit.org/244205@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 444111 [details].
<rdar://problem/85359301>