Update TestExpectations for threaded animation tests

This updates expectations for the recently-added
virtual/threaded/animations test suite.

BUG=244266,248938

Review URL: https://chromiumcodereview.appspot.com/16790002

git-svn-id: svn://svn.chromium.org/blink/trunk@152730 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Add V8 test results to flakiness dashboard.

NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/16848021

git-svn-id: svn://svn.chromium.org/blink/trunk@152731 bbb929c8-8fbe-4397-9dbb-9b2b20218538