Add ARC++ kiosk menu items and ability to start kiosk session.

chrome/browser/resources/chromeos/login/apps_menu.js

Index: chrome/browser/resources/chromeos/login/apps_menu.js
diff --git a/chrome/browser/resources/chromeos/login/apps_menu.js b/chrome/browser/resources/chromeos/login/apps_menu.js
index d16032c0be47f3dc20b261cc621de0bf18a367da..7fe35f5b94ed9f829197bcf832eb13dc7fa743a7 100644
--- a/chrome/browser/resources/chromeos/login/apps_menu.js
+++ b/chrome/browser/resources/chromeos/login/apps_menu.js
@@ -91,6 +91,10 @@ cr.define('login', function() {
      *     mode.
      */
     launchApp_: function(app, diagnosticMode) {
+      if (app.isAndroidApp) {
+        chrome.send('launchArcKioskApp', [app.account_email]);
+        return;
+      }
       if (!diagnosticMode) {
         chrome.send('launchKioskApp', [app.id, false]);
         return;