Backout c8dacd232b02 for Mulet test failure

dom/media/test/eme.js

@@ -121,15 +121,6 @@ function PlayFragmented(test, elem, token)
     var curFragment = 0;
 
     function addNextFragment() {
-      /* We can get another updateevent as a result of calling ms.endOfStream() if
-         the highest end time of our source buffers is different from that of the
-         media source duration. Due to bug 1065207 this can happen because of
-         inaccuracies in the frame duration calculations. Check if we are already
-         "ended" and ignore the update event */
-      if (ms.readyState == "ended") {
-        return;
-      }
-
       if (curFragment >= test.fragments.length) {
         Log(token, "addNextFragment() end of stream");
         ms.endOfStream();