tree 48c32419c60354d4c9923bad273d9b725f5488af
parent 199f20c8a2b1b6eaa92c213aa5a110815ba5f486
author Dave Borowitz <dborowitz@google.com> 1554849327 -0700
committer Dave Borowitz <dborowitz@google.com> 1554993507 -0700

Move checker query methods from Checker to CheckerQuery

Checker remains mostly a dumb value type. CheckerQuery becomes a
non-singleton instance that can have members like RetryHelper injected.
The name stays the same, by a loose analogy to InternalChangeQuery.

In addition to allowing for simpler injection and to separate complex
executions from value types, this will allow us to reuse the query logic
without having an actual Checker instance available.

Change-Id: I7c2e703b676d5bcc08e7f0c8127a1e7293705087