We have enabled the [Supplemental] IDL on Chromium, AppleWebKit, GTK, Qt, Efl and WinCE, and are planning to enable it on all platforms (Meta bug 72138). In this bug, we enable it on AppleWin.
Created attachment 120862 [details] Patch
Sorry for the confusion. Actually, we have already enabled the [Supplemental] IDL on AppleWin at the bug 74900. So I think that what is left is just to add "resolve-supplemental.pl" to build scripts on AppleWin (, which we should have done at the bug 74900).
Comment on attachment 120862 [details] Patch Clearing flags on attachment: 120862 Committed r103918: <http://trac.webkit.org/changeset/103918>
All reviewed patches have been landed. Closing bug.