EmptyProtocolDefinitions.h use to be included (from #include) from WebKit2Prefix.h and it needed an include guard as part of http://trac.webkit.org/changeset/76916.
After http://trac.webkit.org/changeset/76991 the include guard is no longer needed.
Created attachment 84067 [details]
Comment on attachment 84067 [details]
Clearing flags on attachment: 84067
Committed r79888: <http://trac.webkit.org/changeset/79888>
All reviewed patches have been landed. Closing bug.