See http://bugzilla.mozilla.org/show_bug.cgi?id=120818#c14 As well as the issues jst raises there, it's silly having these three separate interfaces that do variations on the same theme and have a lot of their code in common.

Simon, has anybody handled this bug? I noticed these interfaces are no longer called from |nsCopySupport::HTMLCopy| (btw, on a non-bidi system, |Conv_06_FE_WithReverse| was the cause of copying Arabic text in reversed order).

Semion has removed this function and its relatives from the code in order to solve the bug 197375. We have submitted a patch for this bug but it was rejected as the old code depends on charset name to determine the code path. If you have experienced a regression please update with your test cse. Also I suggest you have a look at bug 197375.

Removed in bug 545059