fix es6 class method

Reviewed By: svcscm

Differential Revision: D2938099

fb-gh-sync-id: 1148fdb96ec36a72db6ac4562b12b07ca2fc0af6
shipit-source-id: 1148fdb96ec36a72db6ac4562b12b07ca2fc0af6

docs/CommunicationIOS.md

@@ -45,11 +45,11 @@ import React, {
 } from 'react-native';
 
 class ImageBrowserApp extends React.Component {
-  renderImage: function(imgURI) {
+  renderImage(imgURI) {
     return (
       <Image source={{uri: imgURI}} />
     );
-  },
+  }
   render() {
     return (
       <View>