Doesn't Google own a portion of Uber? Can't they use that for access?
They'll be able to get emails, technical docs, and deposition testimony via the court system.
CEOs of delaware corps have to do whats in the best interest of the company. It is probably not in the best interest of the company to reveal documents to a shareholder for the purpose of being successfully sued by that shareholder.
Its probably entirely impossible for a random investor to demand shit.