Follow-up to 270645@main to address review feedback from Darin. Use Vector constructor / WTF::map() when possible instead of an append*() function. There are a couple of cases in 270645@main where I keep using append*() even though they were calling reserveInitialCapacity() before because the vectors in question have an inline buffer and doing a Vector move assignment may end up having to copy the values in the inline buffers over.
Pull request: https://github.com/WebKit/WebKit/pull/20431
Committed 270679@main (1dfe581ad7a8): <https://commits.webkit.org/270679@main> Reviewed commits have been landed. Closing PR #20431 and removing active labels.
<rdar://problem/118358370>