Chrome doesn't use WebKit, it uses Blink, a fork of WebKit. I'm only referring to WebKit, the Apple open source browser project that builds and works on every major operating system including Windows. If you also want to talk about Blink, Google's browser project that, unlike IE/Spartan/Edge, also works on every major operating system, then that's fine, too.

While we are at it, let's talk about Mozilla's browser and rendering engine that also works on every major operating system.