data.num_missing count includes tests that only had missing pixel results on retry (e.g. "TEXT MISSING"). The overall outcome for such tests is of course REGRESSION, and not MISSING, so we don't include them in layoutTestResults.testsWithMissingResults, and probably shouldn't.
Created attachment 247099 [details] proposed fix
Comment on attachment 247099 [details] proposed fix Clearing flags on attachment: 247099 Committed r180611: <http://trac.webkit.org/changeset/180611>
All reviewed patches have been landed. Closing bug.