Flow for all the files

frontend/components/DropdownMenu/DropdownMenu.js

@@ -1,3 +1,4 @@
+// @flow
 import React from 'react';
 import { browserHistory } from 'react-router';
 

frontend/components/DropdownMenu/components/MoreIcon/MoreIcon.js

@@ -1,3 +1,4 @@
+// @flow
 import React from 'react';
 
 import styles from './MoreIcon.scss';

frontend/components/DropdownMenu/components/MoreIcon/index.js

@@ -1,2 +1,3 @@
+// @flow
 import MoreIcon from './MoreIcon';
 export default MoreIcon;

frontend/components/DropdownMenu/index.js

@@ -1,3 +1,4 @@
+// @flow
 import DropdownMenu, { MenuItem } from './DropdownMenu';
 import MoreIcon from './components/MoreIcon';
 export default DropdownMenu;