> I don’t think one company should own all the stuff that Google does. It gives them way too many perverse incentives over the web.

Does it? It might give them perverse incentives in some cases, but in others it perfectly aligns their incentives by letting them internalize their externalities. The whole selling point of Chrome to executives, and the reason it's introduced so many nice features, is that consolidating means they have an incentive to invest in things that make their websites work better (a better Chrome means a better Google/Gmail/YouTube/Drive).