Two new methods were injected into the existing IWebPreferencesPrivate interface, breaking binary API compatibility.
We need to create a new IWebPreferencesPrivate5 interface holding these two new methods.
It seems these methods were removed again in <http://trac.webkit.org/changeset/212173>.
Created attachment 302940 [details]
Created attachment 302942 [details]
Comment on attachment 302942 [details]
I think this is only relevant to the branch where this code is still present.
This was a branch-specific change.