Address Krinkle's review comments from I51c441d61

See <https://gerrit.wikimedia.org/r/#/c/69161/1/modules/ve/init/mw/ve.init.mw.splitTest.js>.

Change-Id: I14442070c0998d724d67ec41cca813ef5bce2c19
Merge "Address Krinkle's review comments from I51c441d61"