Implement basic mocks for testing.

remoting/webapp/browser_test/mock_signal_strategy.js

+// Copyright 2014 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.
+
+/**
+ * @fileoverview
+ * @suppress {checkTypes}
+ */
+
+'use strict';
+
+/** @suppress {duplicate} */
+var remoting = remoting || {};
+
+/**
+ * @constructor
+ * @implements {remoting.SignalStrategy}
+ */
+remoting.MockSignalStrategy = function() {};
+
+remoting.MockSignalStrategy.prototype.dispose = function() {};
+
+remoting.MockSignalStrategy.prototype.setIncomingStanzaCallback =
+    function(onIncomingStanzaCallback) {};
+
+remoting.MockSignalStrategy.prototype.connect =
+    function(server, username, authToken) {};
+
+remoting.MockSignalStrategy.prototype.sendMessage = function(message) {};
+
+remoting.MockSignalStrategy.prototype.getState = function() {
+  return remoting.SignalStrategy.State.CONNECTED;
+};
+
+remoting.MockSignalStrategy.prototype.getError = function() {
+  return remoting.Error.NONE;
+};
+
+remoting.MockSignalStrategy.prototype.getJid = function() {
+  return '';
+};