fast/images/motion-jpeg-single-frame.html passes on all bots

Remove [ Failure ] from TestExpectations.

BUG=363890
NOTRY=true

Review URL: https://codereview.chromium.org/240323007

git-svn-id: svn://svn.chromium.org/blink/trunk@171837 bbb929c8-8fbe-4397-9dbb-9b2b20218538