Adds annotation to rebaseline a couple of tests

BUG=416655,416775
R=danakj@chromium.org, jamesr@chromium.org

Review URL: https://codereview.chromium.org/598843002

git-svn-id: svn://svn.chromium.org/blink/trunk@182535 bbb929c8-8fbe-4397-9dbb-9b2b20218538