Remove ScopedTaskScheduler usage from cert_loader_unittest.cc.

ScopedTaskScheduler is deprecated.

Bug: 708584
Change-Id: Iae06025b62cf9bfea43d383a3b2a8311263dcf5c
Reviewed-on: https://chromium-review.googlesource.com/586909
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Francois Doray <fdoray@chromium.org>
Cr-Commit-Position: refs/heads/master@{#490395}
1 file changed