With Chrome, Google is trying to reinvent Web browsing. What's that old saying about not fixing it if it ain't broke? Walt Mossberg, the Wall Street Journal's make-or-break gadget reviewer, has played with Chrome for a week. His conclusion: the browser has "promise" — which, if you're familiar with Mossbergspeak, means he thinks it sucks, but he's willing to review the next version in a year. The harshest part: "Despite Google’s claims that Chrome is fast, it was notably slower in my tests at the common task of launching Web pages than either Firefox or Safari."