If you’re interested at all:
Google Chrome is a fork of the open source Chromium with several Google proprietary features. Chromium uses the Blink engine. Blink is a fork of a large component of WebKit called WebCore. Apple primarily develops WebKit (and by proxy WebCore), itself being a fork of KHTML and KJS which were actually discontinued this year.
By not having “None of the above” or an “Other” allowing you to fill in the blank, instantly discards this data as viable. which makes this question pointless to even answer, let alone ask.