[MSE][Mac] Pause playback when readyState drops below HAVE_FUTURE_DATA, and do not complete seek until it rises above HAVE_METADATA.
Created attachment 233833 [details] Patch
Created attachment 233836 [details] Patch Fixed shouldBePlaying() to be >= HAVE_FUTURE_DATA, not >.
Committed r170438: <http://trac.webkit.org/changeset/170438>