[perf] Confirm alert deletions.
[perf] Confirm alert deletions.

Bug: skia:
Change-Id: I6397f28cce8097068fb681484d4c38e247dc42e9
Reviewed-on: https://skia-review.googlesource.com/26580
Reviewed-by: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>
Commit-Queue: 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