The Verge writes, Gaikai, the streaming game service, can let you play games in a browser window. That's impressive, but it's nothing new. Gaikai's service typically uses Java, which means you'll have to install Java, update it, and possibly even grant it permissions before you play a demo of a game. Each one of those clicks and every second you wait is another opportunity for you to decide you'd rather not play anything. But at Google I/O 2012 this week, Gaikai demonstrated a version of the service that doesn't require any download or installation at all. It uses Google's Native Client (NaCL), which sandboxes...