Widen timeout expectations for virtual/threaded/animations tests on Windows.

TBR=jochen@chromium.org
BUG=248938

Review URL: https://codereview.chromium.org/172133005

git-svn-id: svn://svn.chromium.org/blink/trunk@167419 bbb929c8-8fbe-4397-9dbb-9b2b20218538