Add TestExpectations for new failures on Retina

BUG=393706
TBR=falken@chromium.org,dpranke@chromium.org

Review URL: https://codereview.chromium.org/389373005

git-svn-id: svn://svn.chromium.org/blink/trunk@178099 bbb929c8-8fbe-4397-9dbb-9b2b20218538