Use TimeTicks/TimeDelta in interactive_detector_test.cc

Changes methods in this test to use TimeTicks instead of double to
represent timestamps.

Change-Id: Ib888cd0d107e2190d7216ee0e69fea02c34ea78d
Bug: 763980
Reviewed-on: https://chromium-review.googlesource.com/1117829
Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Commit-Queue: Adithya Srinivasan <adithyas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575712}
1 file changed