Add an API test to exersize the open error case. This is a regression test for

chrome/test/data/extensions/api_test/cast_channel/api/test_open_error.js

Index: chrome/test/data/extensions/api_test/cast_channel/api/test_open_error.js
===================================================================
--- chrome/test/data/extensions/api_test/cast_channel/api/test_open_error.js	(revision 0)
+++ chrome/test/data/extensions/api_test/cast_channel/api/test_open_error.js	(revision 0)
@@ -0,0 +1,20 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.

[mark a. foltz, 2014/02/24 06:14:05]

Please update

[Munjal (Google), 2014/02/26 21:30:15]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+var onClose = function(channel) {
+  assertClosedChannel(channel);
+}
+
+var onError = function(channel) {
+  chrome.cast.channel.close(channel, onClose);
+  chrome.test.notifyPass();
+}
+
+var onOpen = function(channel) {

[mark a. foltz, 2014/02/24 06:14:05]

What order are the onOpen, onError, onClose callbacks expected to execute? Does
the test success depend on it?

[Munjal (Google), 2014/02/26 21:30:15]

onError is called first, then onOpen, then onClose.

I am not sure if we should make the test success depend on that.

+  assertClosedChannel(channel);
+  chrome.test.succeed();
+};
+
+chrome.cast.channel.onError.addListener(onError);
+chrome.cast.channel.open( 'cast://192.168.1.1:8009', onOpen);

[mark a. foltz, 2014/02/24 06:14:05]

extra space

[Munjal (Google), 2014/02/26 21:30:15]

Done.