Windows chromoting host installation via the NPAPI plugin

remoting/webapp/remoting.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.
 
 'use strict';
 
 /** @suppress {duplicate} */
 var remoting = remoting || {};
 
 /** @type {remoting.HostSession} */ remoting.hostSession = null;
@@ skipping 167 matching lines @@
  * Returns true if the current platform is fully supported. It's only used when
  * we detect that host native messaging components are not installed. In that
  * case the result of this function determines if the webapp should show the
  * controls that allow to install and enable Me2Me host.
  *
  * @return {boolean}
  */
 remoting.isMe2MeInstallable = function() {
   /** @type {string} */
   var platform = navigator.platform;
-  // Chromoting host is not installable on ChromeOS and any linux distro other
-  // than Ubuntu.
+  // The chromoting host is currently not installable on ChromeOS.
+  // For Linux, we have a install package for Ubuntu but not other distros.
+  // Since we cannot tell from javascript alone the Linux distro the client is
+  // on, we don't show the daemon-control UI for Linux unless the host is
+  // installed.
   return platform == 'Win32' || platform == 'MacIntel';
 }
 
 /**
  * Display the user's email address and allow access to the rest of the app,
  * including parsing URL parameters.
  *
  * @param {string} email The user's email address.
  * @return {void} Nothing.
  */
@@ skipping 299 matching lines @@
 /**
  * Generate a nonce, to be used as an xsrf protection token.
  *
  * @return {string} A URL-Safe Base64-encoded 128-bit random value. */
 remoting.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, '');
 };