Summary:
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Explain the **motivation** for making this change. What existing problem does the pull request solve?
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Make sure tests pass on both Travis and Circle CI.
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For more info, see the ["Pull Requests" section of our "Contributing" guidelines](https://github.com/facebook/react-native/blob/mas
Closes https://github.com/facebook/react-native/pull/7962
Differential Revision: D3397289
fbshipit-source-id: 21adf955af4a623f1ce71e7a5e412020ceaad12a
edfe2a3a06