Pipe custom context menu handling through to the UIDelegate object
Created attachment 264068 [details] Patch
Created attachment 264070 [details] Patch
Created attachment 264073 [details] Patch
Created attachment 264074 [details] Patch
Committed r191600: <http://trac.webkit.org/changeset/191600>
Committed r191607: <http://trac.webkit.org/changeset/191607>