Align XSLTProcessor with Blink and get closer to Gecko (and the specification) in the process.
Created attachment 442815 [details] Patch
Created attachment 442845 [details] Patch
Created attachment 442978 [details] Patch
Committed r285112 (243753@main): <https://commits.webkit.org/243753@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 442978 [details].
<rdar://problem/84885882>