PixelRatio
PixelRatio

Summary: Changelog: [Internal] Flow typing PixelRatio

Reviewed By: yungsters

Differential Revision: D39588444

fbshipit-source-id: c1c358799e8012398b0b66f46bb58964a5d6c77f

javache/react-native,facebook/react-native,javache/react-native,facebook/react-native,facebook/react-native,facebook/react-native,facebook/react-native,javache/react-native,facebook/react-native,javache/react-native,javache/react-native,javache/react-native,javache/react-native,javache/react-native,facebook/react-native,facebook/react-native,facebook/react-native,javache/react-native