Fixed a signed vs. unsigned int warning in slice_tracker_unittest am: 0b2e12b08c
Fixed a signed vs. unsigned int warning in slice_tracker_unittest
am: 0b2e12b08c

Change-Id: I823433be54e0bbd9a77b020a6ccfe4ff623d4d08

google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto