Fix the return information for GetDepChangesForChange.

That function returns a tuple of lists of objects, not a tuple of the objects
themselves.

BUG=None
TEST=Ran run_tests.

Change-Id: Ic32058501aba2566a76dca80e4173d333d02556a
Reviewed-on: https://chromium-review.googlesource.com/200643
Reviewed-by: Yu-Ju Hong <yjhong@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
1 file changed