perf: Move back to 100 commit tiles now that we are on tracedb.
perf: Move back to 100 commit tiles now that we are on tracedb.

BUG=skia:
TBR=mtklein@google.com

Review URL: https://codereview.chromium.org/1551463002

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot