Implement mocks for identity and host-list, add a browser test to test the app in various failure m…

remoting/webapp/js_proto/dom_proto.js

 // Copyright (c) 2012 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.
 
 // This file contains various hacks needed to inform JSCompiler of various
 // WebKit- and Chrome-specific properties and methods. It is used only with
 // JSCompiler to verify the type-correctness of our code.
 
 /** @type {HTMLElement} */
 Document.prototype.activeElement;
@@ skipping 265 matching lines @@
     screenX, screenY, clientX, clientY,
     ctrlKey, altKey, shiftKey, metaKey,
     button, relatedTarget) {};
 
 /**
  * @param {number} begin
  * @param {number=} end
  * @return {ArrayBuffer}
  */
 ArrayBuffer.prototype.slice = function(begin, end) {};
+
+/**
+ * @return {string}
+ */
+Date.prototype.toISOString = function() {};