Not just Linux, but ChromeOS is based on Gentoo Linux (originally Ubuntu); which is to say, much of the userspace stack was pre-exsting as well. The core of the operating system is the Chrome web browser, which was also a pre-exsting project, which a relatively clear business interest to Google (influence over the web platform).
Android has a bit of a better claim, as more of the userspace stack was written for it. It also wasn't started by Google (although they bought Android Inc. years before it was released publicly).
Android has a bit of a better claim, as more of the userspace stack was written for it. It also wasn't started by Google (although they bought Android Inc. years before it was released publicly).