Well, that's interesting. The article mentions this possibly being leverage by Oakland's Davis to get the city (or someone) to keep the team in the Bay Area as he would like. Interesting read, interesting possibilities.
http://www.sfgate.com/raiders/article/Raiders-Chargers-ponder-L-A-move-6091167.php
http://www.sfgate.com/raiders/article/Raiders-Chargers-ponder-L-A-move-6091167.php