trace_processor: fix failing unittests am: 26189a26e1
trace_processor: fix failing unittests
am: 26189a26e1

Change-Id: I26015eb8d92ed41852b27b427b80abd3808140e5

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