By Martin Baccardax Reports suggest employee chatter at San Jose-based has been focused on a potential takeover bid from Netflix. Roku (ROKU) – Get Roku Inc. Report shares surged higher Wednesday following a report that linked the streaming service hub to a potential takeover by Netflix (NFLX) – Get Netflix Inc. Report. Business Insider reported Wednesday that Roku has recently closed the window during which employees can sell their vested stock grants, citing people familiar with the matter, and that talk inside the San Jose, California-based group has focused on a potential takeover bid from…