Some code was recently added to the chromium snap to allow importing an existing chromium profile on first run (typically if chromium was installed by another packaging system, such as apt, and used previously).
This requires read-only access to $HOME/.config/chromium.
This requires the corresponding store declaration to auto-connect the interface.
Note that my goal is to migrate the chromium-browser deb packages in Ubuntu to the snap package, and this bit of functionality is a prerequisite.
FYI, I granted this but due to a regression introduced in the last commit of the review-tools (which wasn’t caught due to a bug in the testsuite that was meant to catch this regression :\ ), the snap still doesn’t pass automated review. This is now fixed in the review-tools and I’ll need to manually approve the snap revisions until this is in production.