Update TestExpectations for threaded animation tests

This is a follow-up to http://crrev.com/16790002, with additional
updates to expectations for the recently-added
virtual/threaded/animations test suite.

BUG=244266,248938

Review URL: https://chromiumcodereview.appspot.com/17552006

git-svn-id: svn://svn.chromium.org/blink/trunk@152892 bbb929c8-8fbe-4397-9dbb-9b2b20218538