GitLab

Convert some bare new()s and a theoretical memory leak into
MakeUnique's.

Bug: 
Change-Id: I1e80714c42f2d7575e774ffdbe2b8f2d5c83c6de
Reviewed-on: https://chromium-review.googlesource.com/801350
Commit-Queue: Kevin Bailey <krb@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#520801}