Improve HRD first run experience

remoting/webapp/base/js/base.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
  * A module that contains basic utility components and methods for the
  * chromoting project
  *
  */
@@ skipping 451 matching lines @@
  *
  * @return {string} A URL-Safe Base64-encoded 128-bit random value. */
 base.generateXsrfToken = function() {
   var random = new Uint8Array(16);
   window.crypto.getRandomValues(random);
   var base64Token = window.btoa(String.fromCharCode.apply(null, random));
   return base64Token.replace(/\+/g, '-').replace(/\//g, '_').replace(/=/g, '');
 };
 
 /**
+ * @return {Object.<string, string>} The URL parameters.
+ */
+base.getUrlParameters = function() {
+  var result = {};
+  var parts = window.location.search.substring(1).split('&');
+  for (var i = 0; i < parts.length; i++) {
+    var pair = parts[i].split('=');
+    result[pair[0]] = decodeURIComponent(pair[1]);
+  }
+  return result;
+}
+
+/**
  * @param {string} jsonString A JSON-encoded string.
  * @return {Object|undefined} The decoded object, or undefined if the string
  *     cannot be parsed.
  */
 base.jsonParseSafe = function(jsonString) {
   try {
     return /** @type {Object} */ (JSON.parse(jsonString));
   } catch (err) {
     return undefined;
   }
 }