Do light cleanup of SB's Blacklist class.

This does C++11ification.

This also does a partial Callback cleanup, only of the instances
where it was obvious what they were. Further cleanup is
left for later.

This also removes ancient cleanup code that has been
cleaning up profiles for 4.5 years now. All the profiles
have been cleaned up by now.

BUG=295882, 714018

Change-Id: I26da23e1a49aa0f776ec1f9ca1310d9254dee3af
Reviewed-on: https://chromium-review.googlesource.com/979613
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Commit-Queue: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#545822}
3 files changed