Mark several media tests for auto rebaselines after Chrome r275501

BUG=369375
TBR=sandersd@chromium.org

Review URL: https://codereview.chromium.org/321603002

git-svn-id: svn://svn.chromium.org/blink/trunk@175702 bbb929c8-8fbe-4397-9dbb-9b2b20218538