Six months ago Warren Buffett (BRK.A) said he looked at a $22B deal and then walked away. Today, analysts are still guessing who that target was, reports the Wall Street Journal. The name that keeps coming up: Chubb Corp. (CB). Barclays (BCS) is the latest to say that the insurance company would make an “attractive asset” for Berkshire. Over the weekend, Barron’s suggested Chubb was potentially the mega-deal that wasn’t and Credit Suisse (CS) previously said the same.