Last modified: 2014-07-30 18:49:12 UTC
If it's not needed, it should be removed
If it's kept, it should be updated.
Use the FormatJson rather than json_(encode|decode) directly
Also doesn't seem to do anything other than decode/encode, presumably as a form of validation?
Removed by Aaron in https://gerrit.wikimedia.org/r/#/c/150061/