1834268 - Stop trying to minimize Sqlite memory

Status: ASSIGNED

(Core :: SQLite and Embedded Database Bindings, task, P3)

Description

[Marco Bonardo [:mak]]

We use the connections array to minimime sqlite memory when we receive a minimize memory notification.
Because we choose at runtime the maximum amount of memory each connection can use, this has a very limited effect, it's likely in the best case we can save a few MiBs, that are unlikely to make a big difference. If a consumer plans to use a larger cache (e.g. Places has a large cache connection for the urlbar) it could minimize memory itself.

Here is the current proposal:

1. stop handling the minimize memory topic globally
2. Have Sqlite.sys.mjs do it for its consumers (vast majority, included the Places large connection)
3. let cpp consumers handle it by themselves where necessary