Initial chrome.mdns API.

chrome/test/data/extensions/api_test/mdns/api/register_listener.js

Index: chrome/test/data/extensions/api_test/mdns/api/register_listener.js
diff --git a/chrome/test/data/extensions/api_test/mdns/api/register_listener.js b/chrome/test/data/extensions/api_test/mdns/api/register_listener.js
new file mode 100644
index 0000000000000000000000000000000000000000..6adf122bfe98eef13e2b848563391b12dbeca160
--- /dev/null
+++ b/chrome/test/data/extensions/api_test/mdns/api/register_listener.js
@@ -0,0 +1,22 @@
+// Copyright (c) 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.
+
+onload = function() {
+  chrome.test.runTests([
+    function registerListener() {
+      var numEvents = 0;
+      chrome.mdns.onServiceList.addListener(function(services) {
+        if (services[0].serviceName != '_googlecast._tcp.local') {
+          chrome.test.fail();
+          return;
+        } else if (numEvents == 1) {
+          chrome.test.succeed();
+        } else {
+          numEvents++;
+        }
+      }, {'serviceType': '_googlecast._tcp.local'});
+      chrome.test.notifyPass();
+    }
+  ]);
+};