Component stylePropTypes keys as constants

src/components/Image/index.js

@@ -11,6 +11,8 @@ const STATUS_LOADING = 'LOADING'
 const STATUS_PENDING = 'PENDING'
 const STATUS_IDLE = 'IDLE'
 
+const imageStyleKeys = Object.keys(ImageStylePropTypes)
+
 const styles = {
   initial: {
     alignSelf: 'flex-start',
@@ -176,7 +178,7 @@ class Image extends React.Component {
     const isLoaded = this.state.status === STATUS_LOADED
     const defaultImage = defaultSource.uri || null
     const displayImage = !isLoaded ? defaultImage : source.uri
-    const resolvedStyle = pickProps(style, Object.keys(ImageStylePropTypes))
+    const resolvedStyle = pickProps(style, imageStyleKeys)
     const backgroundImage = displayImage ? `url("${displayImage}")` : null
 
     /**

src/components/Text/index.js

@@ -3,6 +3,8 @@ import CoreComponent from '../CoreComponent'
 import React, { PropTypes } from 'react'
 import TextStylePropTypes from './TextStylePropTypes'
 
+const textStyleKeys = Object.keys(TextStylePropTypes)
+
 const styles = {
   initial: {
     color: 'inherit',
@@ -43,7 +45,7 @@ class Text extends React.Component {
 
   render() {
     const { children, component, numberOfLines, style, testID } = this.props
-    const resolvedStyle = pickProps(style, Object.keys(TextStylePropTypes))
+    const resolvedStyle = pickProps(style, textStyleKeys)
 
     return (
       <CoreComponent

src/components/TextInput/index.js

@@ -3,6 +3,8 @@ import CoreComponent from '../CoreComponent'
 import React, { PropTypes } from 'react'
 import TextInputStylePropTypes from './TextInputStylePropTypes'
 
+const textInputStyleKeys = Object.keys(TextInputStylePropTypes)
+
 const styles = {
   initial: {
     appearance: 'none',
@@ -70,7 +72,7 @@ class TextInput extends React.Component {
       testID
     } = this.props
 
-    const resolvedStyle = pickProps(style, Object.keys(TextInputStylePropTypes))
+    const resolvedStyle = pickProps(style, textInputStyleKeys)
     const type = secureTextEntry && 'password' || (keyboardType === 'default' ? '' : keyboardType)
 
     return (

src/components/View/index.js

@@ -3,6 +3,8 @@ import CoreComponent from '../CoreComponent'
 import React, { PropTypes } from 'react'
 import ViewStylePropTypes from './ViewStylePropTypes'
 
+const viewStyleKeys = Object.keys(ViewStylePropTypes)
+
 const styles = {
   // https://github.com/facebook/css-layout#default-values
   initial: {
@@ -51,7 +53,7 @@ class View extends React.Component {
   render() {
     const { accessibilityLabel, pointerEvents, style, testID, ...other } = this.props
     const pointerEventsStyle = pointerEvents && { pointerEvents }
-    const resolvedStyle = pickProps(style, Object.keys(ViewStylePropTypes))
+    const resolvedStyle = pickProps(style, viewStyleKeys)
 
     return (
       <CoreComponent