Add key validation to React.Children.toArray#11561

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clemmy wants to merge 3 commits intofacebook:masterfrom clemmy:warn-react-children-keys

+271-11

Commits on Nov 15, 2017

Add tests for react children key warnings
Clement Hoang
committed
Implementation for explicit key warnings in ReactChildren
Clement Hoang
committed
Warn for React.Children.map
Clement Hoang
committed