What about a competitor with comparable resources? Not really challenging your claim, I'm actually just curious. Why don't Google's competitors just use Google's own OSS against them?

Say Facebook acquires Rockmelt, which is based on Chromium. Rockmelt as an independent browser isn't much of a threat, but with Facebook's resources (money, engineering, publicity), they could easily bake in their own social stuff on top of an already amazing browser.

Same thing with Amazon/Kindle and Android.