This patch replaces |ResetTables|(clear table's in-memory and on-disk
data) with |DeleteTables|(clear table's on-disk data) in GetLookupCache to avoid infinite
loop.
We can just delete on-disk data when file corruption is detected in |GetLookupCache|
without clearing the cache's internal data and refreshing current
active caches because in that scenario, the lookup cache failing to read
database has not yet added to the active caches list.
Differential Revision: https://phabricator.services.mozilla.com/D43181
4fc32e69a6