[LayoutNG] Skip virtual/spv175/ for layout_ng bots

This is redundant because the "--enable-slimming-paint-v175" is
implied for layout_ng bots, or whenever LayoutNGPaintFragments
is enabled.

TBR=eae@chromium.org
NOTRY=true

Bug: 591099
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_layout_tests_layout_ng
Change-Id: I3b02a4c56346d251c6f913e79eca6280bc662584
Reviewed-on: https://chromium-review.googlesource.com/839203
Commit-Queue: Koji Ishii <kojii@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#525688}
1 file changed