In the third negotiating phase, it seems implied that he accepted the offer from Google and will now start working there. The most relevant part is here:

You are not legally obligated to follow through with your promise, but I wouldn't advise breaking it or using it just to extract more value to use as leverage against other companies. Use this tactic at the very end to extract that last bit of value from the company that's already the best. This is what I did with Google. I asked for about 3% higher salary and 12% more equity than what they were offering, and they came back with the exact numbers I requested, which means I should have asked for more.