Neither Waymo nor Uber have actually made much money from self-driving cars at this point - Uber has its small-scale pilot programs, and Waymo has R&D partnerships with companies like Avis and Lyft. But unless there are some major potential deals that Waymo missed out on because of Uber's mere presence and their quick development of self-driving technology, I can't imagine they'd be able to argue that they've been damaged at this point - this isn't like a patent case where companies are making money off their products.
It'd be interesting to see a more unusual argument from Waymo, though - something like "The trade secrets Uber stole allowed them to more easily recruit engineers, reducing the talent pool available to us and delaying the wide release of our own product."