GitLab

Previews logger was using some uninitialized bools. They are trivially
initialized in the class, so this CL makes it so.

Change-Id: I83ec951df6d79748fc538ba7cbae0018546bbe52
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1699591Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Commit-Queue: Kevin Bailey <krb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#676978}