Suppress virtual/slimmingpaint layout test failures.
Suppress virtual/slimmingpaint layout test failures.

The failures were introduced by blink:195442.

BUG=489143
TBR=pdr@chromium.org

Review URL: https://codereview.chromium.org/1141293002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@195455 bbb929c8-8fbe-4397-9dbb-9b2b20218538

Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk