Improve HRD first run experience

remoting/webapp/crd/js/hangout_consent_dialog_main.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
+* The entry point for dialog_hangout_consent.html.
+*/
+
+
+/** @suppress {duplicate} */
+var remoting = remoting || {};
+
+(function() {
+
+'use strict';
+
+/**
+ * @constructor
+ * @param {HTMLElement} rootElement
+ * @param {string} requestToken
+ * @param {boolean} authorized Whether the user is authorized or not.
+ */
+var ConsentDialog = function(rootElement, requestToken, authorized) {
+  /** @private */
+  this.okButton_ = rootElement.querySelector('.ok-button');
+  /** @private */
+  this.cancelButton_ = rootElement.querySelector('.cancel-button');
+  /** @private */
+  this.authSection_ = rootElement.querySelector('.auth-message');
+  /** @private */
+  this.requestToken_ = requestToken;
+
+  if (authorized) {
+    this.authSection_.hidden = true;
+  }
+
+  this.okButton_.addEventListener('click', this.onButton_.bind(this, true));
+  this.cancelButton_.addEventListener('click',this.onButton_.bind(this, false));
+  base.resizeWindowToContent();
+};
+
+/**
+ * @param {boolean} confirm
+ * @private
+ */
+ConsentDialog.prototype.onButton_ = function(confirm) {
+  base.Ipc.invoke('remoting.HangoutConsentDialog.confirm', confirm,
+                  this.requestToken_);
+  chrome.app.window.current().close();
+};
+
+function onDomContentLoaded() {
+  var params = base.getUrlParameters();
+  var authorized = getBooleanAttr(params, 'authorized', false);
+  var token = getStringAttr(params, 'token');
+  l10n.localize();
+  var confirmDialog = new ConsentDialog(document.body, token, authorized);
+}
+
+window.addEventListener('load', onDomContentLoaded);
+
+}());