GitLab

It calls MigrateShortcutsInPathInternal several time and each call may
or may not load DLL's, so the whole thing needs to be in the foreground
in case it needs the loader lock.

R=gab

Bug: 1047442
Change-Id: Id962af6556e312bf638066e33268fe4902e0110f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2032005Reviewed-by: Gabriel Charette <gab@chromium.org>
Commit-Queue: Joe Mason <joenotcharles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#737532}