R1:68f1ca896d55

Fix misspelled file name

Summary: This class was renamed in D9991, but the filename is incorrect.

Test Plan: Eyeball it

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D10117