Implement kiosk multiple apps feature.

chrome/test/data/chromeos/app_mode/multi_app_kiosk/src/secondary_app_2/main.js

Index: chrome/test/data/chromeos/app_mode/multi_app_kiosk/src/secondary_app_2/main.js
diff --git a/chrome/test/data/chromeos/app_mode/multi_app_kiosk/src/secondary_app_2/main.js b/chrome/test/data/chromeos/app_mode/multi_app_kiosk/src/secondary_app_2/main.js
new file mode 100644
index 0000000000000000000000000000000000000000..15cb92d9985ffe3dfcc6063902d8345e2b8afa88
--- /dev/null
+++ b/chrome/test/data/chromeos/app_mode/multi_app_kiosk/src/secondary_app_2/main.js
@@ -0,0 +1,11 @@
+// Copyright (c) 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+chrome.app.runtime.onLaunched.addListener(function(launchData) {
+  chrome.app.window.create('app_main.html',
+      { 'width': 1920,
+        'height': 1080 },
+      function(window) {
+  });
+});