Summary:Should be self-explanatory.
__Edit__: oh turns out I fixed a memory leak too because of a typo of the typo on teardown.
cc ericvicenti
Closes https://github.com/facebook/react-native/pull/6309
Differential Revision: D3016576
fb-gh-sync-id: 608a39ad293154e47480003bc9b450b521cddbb1
shipit-source-id: 608a39ad293154e47480003bc9b450b521cddbb1