Chrome updated to version 35 a few days ago, and I'm releasing an updated version of my "Evolution of Chrome Databases Reference Chart" to cover those new versions.
The first version of the reference chart covered Chrome v1 - v30. In the following five versions, there were a few database changes, including how autofill dates are saved and encrypting HTTP cookies at rest. From my testing, it appears that only cookies created after Chrome has been updated to v33+ are stored encrypted. Cookies created before the upgrade are still stored in plain text and aren't encrypted automatically. A number of Hindsight plugins analyze cookies and now won't work on new cookies until I find a way to decrypt the values.