task_contoller_unittest: move setupFileManagerPrivate() to Setup()

After CL:1364270 all test cases begin with a setupFileManagerPrivate()
call: move that into Setup().

No change in test behavior, no new tests.

Bug: 912410
Change-Id: I36e2180012918ec00d552397395c8bb61048382c
Reviewed-on: https://chromium-review.googlesource.com/c/1364996
Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Commit-Queue: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#614546}
1 file changed