Luckily Google does not, to my knowledge, try to have non-competes in their contracts, and they would not be enforceable in California, otherwise the problem with companies their size would be that they "compete" in an awfully large number of business areas.

Going from Google to Tesla? Sorry, they're a competitor in driving cars. Spotify? They compete in streaming music. Microsoft? They compete in search. Apple? They compete in cellphones. Telegram Inc? Google does instant messaging. Garmin? Google does maps. NCR? Every heard of Google Wallet?