Converted remoting.Error from an enum to a class

remoting/webapp/unittests/xmpp_connection_unittest.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.
 
 (function() {
 
 'use strict';
 
 var testUsername = 'testUsername@gmail.com';
 var testToken = 'testToken';
@@ skipping 45 matching lines @@
       'xmpp.example.com:123', 'testUsername@gmail.com', 'testToken');
   sinon.assert.calledWith(onStateChange,
                           remoting.SignalStrategy.State.CONNECTING);
   sinon.assert.calledWith(chrome.socket.create, "tcp", {});
   chrome.socket.create.$testStub.getCall(0).args[2]({socketId: socketId});
 
   sinon.assert.calledWith(
       chrome.socket.connect, socketId, "xmpp.example.com", 123);
   chrome.socket.connect.$testStub.getCall(0).args[3](-1);
 
-  QUnit.equal(connection.getError(), remoting.Error.NETWORK_FAILURE);
+  QUnit.equal(connection.getError().tag, remoting.Error.Tag.NETWORK_FAILURE);
 });
 
 test('should use XmppLoginHandler to complete handshake and read data',
      function() {
   connection.connect(
       'xmpp.example.com:123', 'testUsername@gmail.com', 'testToken');
   sinon.assert.calledWith(onStateChange,
                           remoting.SignalStrategy.State.CONNECTING);
   sinon.assert.calledWith(chrome.socket.create, "tcp", {});
   chrome.socket.create.$testStub.getCall(0).args[2]({socketId: socketId});
@@ skipping 17 matching lines @@
 
   // Simulate read() callback with |data|. It should be passed to the parser.
   var data = base.encodeUtf8('<iq id="1">hello</iq>');
   sinon.assert.calledWith(chrome.socket.read, socketId);
   var appendDataCalled = parserMock.expects('appendData').once().withArgs(data);
   chrome.socket.read.$testStub.getCall(0).args[1]({resultCode: 0, data: data});
   appendDataCalled.verify();
 });
 
 })();