STOCKHOLM (Reuters) – Swedish eye tracking technology firm Tobii, co-owned by chipmaker Intel, is planning a stock market listing which could value the firm at around 2 billion crowns ($309 million), business daily Dagens Industri reported. Tobii, which develops eye-controlled devices that can be used in computer interaction and in human behavior analysis, was founded in 2001 and employs around 380, according to its website. Among its owners it counts U.S. …