Implement DaemonController::GetVersion() method on Linux

remoting/webapp/host_controller.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 || {};
 
 /** @constructor */
 remoting.HostController = function() {
   /** @type {remoting.HostPlugin} @private */
   this.plugin_ = remoting.HostSession.createPlugin();
   /** @type {HTMLElement} @private */
   this.container_ = document.getElementById('daemon-plugin-container');
   this.container_.appendChild(this.plugin_);
   /** @type {remoting.Host?} */
   this.localHost = null;
   /** @param {string} version */
   var printVersion = function(version) {
     if (version == '') {
       console.log('Host not installed.');
     } else {
-      console.log('Host version:', version);
+      console.log('Host version: ' + version);
     }
   };
   try {
     this.plugin_.getDaemonVersion(printVersion);
   } catch (err) {
     console.log('Host version not available.');
   }
 };
 
 // Note that the values in the enums below are copied from
@@ skipping 338 matching lines @@
   try {
     this.plugin_.getDaemonConfig(onConfig);
   } catch (err) {
     this.setHost(null);
     onDone();
   }
 };
 
 /** @type {remoting.HostController} */
 remoting.hostController = null;