mozilla/servo — pull request #2602 by mbrubeck (2014-06-06 16:11:42+00:00)
Title: Don't require root pipeline to match new pipeline

This reverts 2b0134be7bb8a4372f1a8703b5a1b114e65351f6 because it was not correct for iframes. Oops. (Wasn't caught by tests because we still have other crashes preventing iframe testing.) r? @pcwalton.