[Sheriff] Mark virtual/stable/webexposed/global-interface-listing-shared-worker.html as Slow

TBR=sebsg@chromium.org

Bug: 910627
Change-Id: Icb95e394739142d44f2c73a6408e7def8a03fa6f
Reviewed-on: https://chromium-review.googlesource.com/c/1357508
Reviewed-by: Hiroshige Hayashizaki <hiroshige@chromium.org>
Commit-Queue: Hiroshige Hayashizaki <hiroshige@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612841}
1 file changed