Netflix doesn’t want anyone to know how many people watch its original shows, like “House of Cards” and “Orange Is the New Black.” But until a few months ago, at least one company had a pretty good idea — and shared it publicly. Now Netflix has plugged that leak. Procera Networks, a broadband monitoring company, says it was able to track individual shows Netflix users streamed on multiple Internet networks for several days at a time. It published its findings on a company blog three times: When Netflix launched “House of Cards” and “Arrested Development” in 2013, and this year, when the company streamed its second season of “House of Cards.” Procera couldn’t provide overall viewership numbers for Netflix’s shows, but could at least provide directional information, by showing how they performed on several of its client’s networks.