Initial chrome.mdns API.

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

Index: chrome/test/data/extensions/api_test/mdns/api/register_multiple_listeners.js
diff --git a/chrome/test/data/extensions/api_test/mdns/api/register_multiple_listeners.js b/chrome/test/data/extensions/api_test/mdns/api/register_multiple_listeners.js
new file mode 100644
index 0000000000000000000000000000000000000000..ef7611d9796ffb8662fe4b67816a32245ffe40dc
--- /dev/null
+++ b/chrome/test/data/extensions/api_test/mdns/api/register_multiple_listeners.js
@@ -0,0 +1,23 @@
+// 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 registerListeners() {
+      var numEvents = 0;
+      chrome.mdns.onServiceList.addListener(function(services) {
+        if (numEvents++ == 1) {
+          chrome.test.succeed();
+        }
+      }, {'serviceType': '_googlecast._tcp.local'});
+
+      chrome.mdns.onServiceList.addListener(function(services) {
+        if (numEvents++ == 1) {
+          chrome.test.succeed();
+        }
+      }, {'serviceType': '_testing._tcp.local'});
+      chrome.test.notifyPass();
+    }
+  ]);
+};