I think you missed the point, there's two forks in the history of Blink (Chromium). Yes, Blink is a fork of WebKit, but WebKit is a fork of KHTML. So it's not like it originated at Apple either, it originated at KDE.
I've already stated that Chrome's success is not just because that it was forked from Webkit (e.g. v8, and other things that people mentioned here as well), but it was a huge jumpstart for them, and it would've taken them much longer to get a leading browser without it. e.g. Microsoft basically gave up on developing their own engine after failing with IE and the original Edge - and are now also based on Chromium.
Chrome is (IMO) much better than Safari, Maps is (IMO) a great product, Youtube is a a huge success and much bigger than it was when they bought it (homegrown Google Video failed), Android was also essentially an acquihire, as others have mentioned (using a lot of Google's resources) and is hugely successful. It doesn't change the fact that most existing Google products today are acquisitions that they improved, and not home-grown products from the "20% do your own thing" era - which is what the original comment talked about.