Summary: …an the font size (per CSS spec) Extending upon work https://github.com/facebook/react-native/pull/7603 Closes https://github.com/facebook/react-native/pull/8851 ![screen shot 2016-08-04 at 14 49 21](https://cloud.githubusercontent.com/assets/7275322/17404165/bd67bc48-5a52-11e6-9ba1-5a8524f18867.png) ![screen shot 2016-08-04 at 14 49 24](https://cloud.githubusercontent.com/assets/7275322/17404167/be5f4044-5a52-11e6-9014-391349f9c5e1.png) Closes https://github.com/facebook/react-native/pull/9211 Differential Revision: D3706347 fbshipit-source-id: 0adfff8e8418b02f9b5d6671f5c89669e41abec3