And since Chromium browser is an open source browser which receives many contributions from many developers[2], this will add Google to the list of companies which take contributions from OSS and make money off it.
Please correct me if I'm wrong, but I'm not aware of any other OSS product which contributes to their revenue in a direct way. Only thing that comes close is Kubernetes and then Tensorflow, but both aren't in the same 'level' that chrome is in now.
[1]:https://enterprise.google.com/chrome/contact/?lsc=assist [2]:http://www.chromium.org/Home