Web Animations CSS: Update virtual/threaded failures

TBR=steveblock
NOTRY=true
BUG=322272

Review URL: https://codereview.chromium.org/83153003

git-svn-id: svn://svn.chromium.org/blink/trunk@162534 bbb929c8-8fbe-4397-9dbb-9b2b20218538