Add defaultIconDatabasePath in APIWebsiteDataStore and move implementation to there because IconDatabase is website data as well.
Created attachment 267826 [details] Patch
Created attachment 267838 [details] Patch
It seems that this patch doesn't comply with article 3 of https://lists.webkit.org/pipermail/webkit-dev/2013-January/023255.html because iconDatabasePath is not for all ports but efl and gtk. So I close this bug as invalid.