Initial implementation of music manager private API.

chrome/test/data/extensions/platform_apps/music_manager_private/device_id_value_returned/chrometest.js

Index: chrome/test/data/extensions/platform_apps/music_manager_private/device_id_value_returned/chrometest.js
diff --git a/chrome/test/data/extensions/platform_apps/music_manager_private/device_id_value_returned/chrometest.js b/chrome/test/data/extensions/platform_apps/music_manager_private/device_id_value_returned/chrometest.js
new file mode 100644
index 0000000000000000000000000000000000000000..fb18bb04e56065249be8e40a689af9bf9455c1af
--- /dev/null
+++ b/chrome/test/data/extensions/platform_apps/music_manager_private/device_id_value_returned/chrometest.js
@@ -0,0 +1,22 @@
+// Copyright 2013 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.
+
+function runTests() {
+  chrome.test.runTests([
+    function test() {
+      chrome.musicManagerPrivate.getDeviceId(function(id) {
+          console.log("Device ID=" + id);
+          chrome.test.assertEq("string", typeof id);
+          chrome.test.assertTrue(id.length >= 8);
+          chrome.test.succeed();
+      });
+    }
+  ]);
+}
+
+window.onload = function() {
+  chrome.test.getConfig(function(config) {
+    runTests();
+  });
+}