chromium/components/safe_browsing/core/browser/db/README.md

safe_browsing_db/ will contain the database-related code from existing
safe_browsing/ directories, and will house the new Pver4 database+update
implementation.

Examples of how to delete or rename an existing store are here:
* [Delete a store](https://crrev.com/c/4481844)
* [Rename a store](https://crrev.com/c/4336517)