He is essentially claiming that encouraging voter turnout is a partisan act biased towards the Democratic Party (rather than something which makes elections fairer) and hence Google engaged in a partisan act by simply encouraging higher turnout.
And if "go vote" is a threat to democracy then I shudder to think of what newspaper endorsements, superpac advertisements and opinion news channels are. Heck, election day isn't a federal holiday so flexible work hours (which favor the professional class and therefore Republicans) must be a conspiracy to sway elections!
It's baffling that anybody takes this seriously.