The blog post he links to:

http://blog.chromium.org/2010/06/in-open-for-rlz.html

says "Chromium will also continue to exist as it always has, without any RLZ library included. And, you can still download a Google Chrome with no RLZ behavior at www.google.com/chrome. But now that RLZ is open, Google Chrome distributed through promotional means will include this open-source implementation of RLZ.".

So what makes the continuous Chromium build a "Google Chrome distributed through promotional means"?