Brian Vaughn 703936d9e3 Sync React master (and 16 alpha 4)
Reviewed By: sebmarkbage

Differential Revision: D4747529

fbshipit-source-id: 5efea6422a2502f27c1b23506cbae2187c7f7b0d
2017-03-22 21:30:50 -07:00
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2017-03-22 21:30:50 -07:00