In all honesty I don't know if something like this needs a license, but it's licensed under GPL v2 anyway. It's worth noting that this is a first for me on many levels (open source, releasing a project not related to my job, using TortoiseSVN). As such, I'm not sure if I'm doing this right, but here's hoping the HN community will steer me in the right direction.
http://code.google.com/p/chrome-api-vsdoc/