This issue should spread the approach first applied for a couple of WK2 EFL API classes at http://trac.webkit.org/changeset/131298 to all the existing WK2 EFL classes where it is advisable.
Looks like a big work to convert all objects at once, and such patch would be hard to manage (rebase, review) by the way. Think it's worth making this bug a meta bug.
Do not have manual reference counting in EFL WK2 any more. Yay!