Mark virtual/threaded/animations/webkit-perspective.html crashing in debug

TBR=hendrikw@chromium.org,pdr,wjmaclean
BUG=416367

Review URL: https://codereview.chromium.org/591003002

git-svn-id: svn://svn.chromium.org/blink/trunk@182396 bbb929c8-8fbe-4397-9dbb-9b2b20218538