Perf - cleanups to domain-picker-sk.
Perf - cleanups to domain-picker-sk.

Bug: skia:9219
Change-Id: I533cd8082b1d29d02d225559769311cec6dac799
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/227101
Reviewed-by: Kevin Lubick <7cdab2cfab351f23814786ba39716e90eed69047@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