Pritesh Nandgaonkar 9f7cedbe14 Remove the use of legacy flag and log the diff if its used
Reviewed By: emilsjolander

Differential Revision: D6856812

fbshipit-source-id: e4724d80702cc75c1894e348e137b24e663573d2
2018-02-02 07:40:25 -08:00
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