Fix stats so it doesn't hang the server.
Fix stats so it doesn't hang the server.

BUG=skia:
NOTREECHECKS=True
R=mtklein@google.com
TBR=mtklein

Author: jcgregorio@google.com

Review URL: https://codereview.chromium.org/467263004

google/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot