Disabling flaky backdrop-filter-plus-filter test

TBR=masonfreed@chromium.org
NOTRY=true

Bug: 912748
Change-Id: Ifd814b53adc325737cc5f688551e6fe9c64d910f
Reviewed-on: https://chromium-review.googlesource.com/c/1368164
Reviewed-by: Mason Freed <masonfreed@chromium.org>
Commit-Queue: Mason Freed <masonfreed@chromium.org>
Cr-Commit-Position: refs/heads/master@{#614736}
1 file changed