It has been added as a stub but later ShareableBitmapCairo.cpp has been introduced with the real implementation for Gtk.
Let's remove this file.
Created attachment 118232 [details]
Comment on attachment 118232 [details]
Clearing flags on attachment: 118232
Committed r102251: <http://trac.webkit.org/changeset/102251>
All reviewed patches have been landed. Closing bug.