Fixed a signed vs. unsigned int warning in slice_tracker_unittest am: 0b2e12b08c am: 640b3cf1a2 am: b967d7b37c am: 3a231299ae
Fixed a signed vs. unsigned int warning in slice_tracker_unittest am: 0b2e12b08c am: 640b3cf1a2 am: b967d7b37c
am: 3a231299ae

Change-Id: I76baf1b075a0ad6f14fec2cd4a9b3b1287091b66

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