Extensions Cookie API is available starting in Dev 6.0.472.0

The full API documentation may not be up yet in the extensions developer documentation (but it should be available soon), but you can peruse the Trunk documentation which includes an example at:

http://src.chromium.org/svn/trunk/sr...s/api/cookies/

To use the Cookies API, you will need this permission:

"permissions": [ "cookies" ]