Initialize session explicitly

lib/browser/api/app.js

@@ -1,9 +1,11 @@
 'use strict'
 
-const electron = require('electron')
-const {Menu} = electron
+const {Menu} = require('electron')
 const EventEmitter = require('events').EventEmitter
 
+// Initialize session
+require('electron').session
+
 const bindings = process.atomBinding('app')
 const downloadItemBindings = process.atomBinding('download_item')
 const app = bindings.app