We don't know of any actual bug in the implementation of the
pool that may result in a deadlock, but this still implements
a means out of a deadlock if one ever arises anyway. It's
meant to improve the resilience of the spell checker.
Bug: 5441027
Change-Id: I689491090792dbb89110ee56631965c5bb2dc712
The dictionaries and proximities are not thread-safe. In order to
be able to check spelling in parallel, make a dictionary pool to
call upon when a spelling check is necessary.
Bug: 5156851
Change-Id: Ie3796164187dd7b7abf5ccd5d014073d43d74408
