Use more explicit reference type
Use more explicit reference type

Summary: MSVC wants the template type fully specified here.

Reviewed By: passy

Differential Revision: D23820254

fbshipit-source-id: 222119b297a821b23d4768be50d2b4efe0b9efc3

facebookincubator/fbjni,facebookincubator/fbjni,facebookincubator/fbjni,facebookincubator/fbjni