Fix HostDaemonFacade to handle the case when NM host is not installed.

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 */
@@ skipping 413 matching lines @@
   this.hostDaemonFacade_.getDaemonConfig(onConfig, onError);
 };
 
 /**
  * Get the state of the local host.
  *
  * @param {function(remoting.HostController.State):void} onDone Completion
  *     callback.
  */
 remoting.HostController.prototype.getLocalHostState = function(onDone) {
-  this.hostDaemonFacade_.getDaemonState(onDone, function(error) {
-    onDone(remoting.HostController.State.UNKNOWN);
-  });
+  /** @param {remoting.Error} error */
+  function onError(error) {
+    onDone((error == remoting.Error.MISSING_PLUGIN) ?
+               remoting.HostController.State.NOT_INSTALLED :
+               remoting.HostController.State.UNKNOWN);
+  }
+  this.hostDaemonFacade_.getDaemonState(onDone, onError);
 };
 
 /**
  * Get the id of the local host, or null if it is not registered.
  *
  * @param {function(string?):void} onDone Completion callback.
  */
 remoting.HostController.prototype.getLocalHostId = function(onDone) {
   /** @type {remoting.HostController} */
   var that = this;
@@ skipping 43 matching lines @@
  * @param {function(remoting.Error):void} onError Error callback.
  * @return {void}
  */
 remoting.HostController.prototype.clearPairedClients = function(
     onDone, onError) {
   this.hostDaemonFacade_.clearPairedClients(onDone, onError);
 };
 
 /** @type {remoting.HostController} */
 remoting.hostController = null;