Fix layoutTime calculation
Fix layoutTime calculation

Summary: LayoutTime calculation is also trivially wrong. Quick fix.

Reviewed By: shergin

Differential Revision: D15725167

fbshipit-source-id: b06672b9df9cbaa6c54aa97a4c0b58a43f70d5b2

hoangpham95/react-native,exponent/react-native,janicduplessis/react-native,hoangpham95/react-native,hoangpham95/react-native,myntra/react-native,janicduplessis/react-native,arthuralee/react-native,exponent/react-native,myntra/react-native,pandiaraj44/react-native,hammerandchisel/react-native,janicduplessis/react-native,hammerandchisel/react-native,exponentjs/react-native,pandiaraj44/react-native,arthuralee/react-native,pandiaraj44/react-native,facebook/react-native,exponentjs/react-native,janicduplessis/react-native,myntra/react-native,exponentjs/react-native,hammerandchisel/react-native,arthuralee/react-native,janicduplessis/react-native,javache/react-native,myntra/react-native,facebook/react-native,exponentjs/react-native,javache/react-native,myntra/react-native,arthuralee/react-native,hammerandchisel/react-native,myntra/react-native,hammerandchisel/react-native,javache/react-native,hammerandchisel/react-native,hoangpham95/react-native,myntra/react-native,facebook/react-native,pandiaraj44/react-native,javache/react-native,facebook/react-native,hoangpham95/react-native,myntra/react-native,hoangpham95/react-native,javache/react-native,exponent/react-native,janicduplessis/react-native,javache/react-native,exponentjs/react-native,facebook/react-native,exponent/react-native,hoangpham95/react-native,hammerandchisel/react-native,pandiaraj44/react-native,exponentjs/react-native,javache/react-native,pandiaraj44/react-native,facebook/react-native,pandiaraj44/react-native,javache/react-native,pandiaraj44/react-native,janicduplessis/react-native,facebook/react-native,exponent/react-native,facebook/react-native,javache/react-native,hoangpham95/react-native,myntra/react-native,exponent/react-native,janicduplessis/react-native,exponent/react-native,exponentjs/react-native,arthuralee/react-native,facebook/react-native,hammerandchisel/react-native,exponent/react-native,exponentjs/react-native