GitLab

Extract CertDbInitializer interface from the implementation
to allow writing a mock for it. This is a refactoring with no
intentional change to behavior.

Bug: 1145946
Change-Id: If08abcdcd1257d574137d2d5d1264dc389e868f0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2581925
Commit-Queue: Michael Ershov <miersh@google.com>
Reviewed-by: Erik Chen <erikchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836081}