Limit number of service instances passed to onServiceList listeners.

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

Index: chrome/test/data/extensions/api_test/mdns/api/get_max_service_instances.js
diff --git a/chrome/test/data/extensions/api_test/mdns/api/get_max_service_instances.js b/chrome/test/data/extensions/api_test/mdns/api/get_max_service_instances.js
new file mode 100644
index 0000000000000000000000000000000000000000..b9af28be626ffd7ad9325ea9aa25fcc13733db9f
--- /dev/null
+++ b/chrome/test/data/extensions/api_test/mdns/api/get_max_service_instances.js
@@ -0,0 +1,12 @@
+// Copyright 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.
+
+onload = function() {
+  chrome.test.runTests([
+    function getMaxServiceInstancesPerEvent() {
+      chrome.test.assertEq(64, chrome.mdns.maxServiceInstancesPerEvent);
+      chrome.test.notifyPass();
+    }
+  ]);
+};