Also use the non-unicode version of LoadLibrary explicitly.

Bug: chromium:919163
Change-Id: I4841c3eef586ff57563915da12765baaa6e0b146
Reviewed-on: https://chromium-review.googlesource.com/c/1398642Reviewed-by: Bruce Dawson <brucedawson@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>