Even if it is legal, Google won't do it. Their power comes from having a search engine and index that reaches across the internet. They simply won't drop Facebo

Even if it is legal, Google won't do it. Their power comes from having a search engine and index that reaches across the internet. They simply won't drop Facebook from it unless they have an completely legitimate reason (I believe BMW or one of the other high-end car brands were temporarily banned for shady SEO tactics). Similarly in the mobile space, even though Google is in head-on competition with Apple, they still develop iphone-optimized versions of their apps. That's just good business. Just the same way Microsoft won't make Google/Apple products not work on Windows.