Demonstrate converting a React component to ES6 class (supported in 0.13)

resources/frontend_client/app/query_builder/icon.react.js

@@ -2,15 +2,13 @@
 
 import { loadIcon } from 'metabase/icon_paths';
 
-export default React.createClass({
-    displayName: 'Icon',
-    render: function () {
+export default class Icon extends React.Component {
+    render() {
         var icon = loadIcon(this.props.name);
-
         if (icon.svg) {
             return (<svg {... icon.attrs} {... this.props} dangerouslySetInnerHTML={{__html: icon.svg}}></svg>);
         } else {
             return (<svg {... icon.attrs} {... this.props}><path d={icon.path} /></svg>);
         }
     }
-});
+}