ORWT didn't make bots red when a new test was committed with Mac specific expected result and without expected result for other ports. Unfortunately NRWT make the bot red with this message: "failed 1 failed" It would be better if new tests made the bot orange as ORWT did.
The result of a test without expected file is: fast/forms/textarea-placeholder-wrapping.html: unknown failure type MISSING But results.html has the test correctly listed as new Tests that had no expected results (probably new): fast/forms/textarea-placeholder-wrapping.html result
I suspect the "orange" part is special code in teh buildbot master.
Yup, should just be a small chagne here: http://trac.webkit.org/browser/trunk/Tools/BuildSlaveSupport/build.webkit.org-config/master.cfg#L218
*** This bug has been marked as a duplicate of bug 64812 ***