Perf - Refresh the BigTable gRPC client periodically.
Perf - Refresh the BigTable gRPC client periodically.

Bug: skia:
Change-Id: Ifca226f1106eabf2b93472236b338272357e580d
Reviewed-on: https://skia-review.googlesource.com/c/169850
Commit-Queue: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>
Reviewed-by: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>

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