Download the host components when user tries to enable Me2Me host.

remoting/webapp/host_native_messaging.js

 // Copyright 2013 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
  * Class to communicate with the Host components via Native Messaging.
  */
 
 'use strict';
@@ skipping 347 matching lines @@
 };
 
 /**
  * @return {void} Nothing.
  * @private
  */
 remoting.HostNativeMessaging.prototype.onDisconnect_ = function() {
   console.error('Native Message port disconnected');
 
   // Notify the error-handlers of any requests that are still outstanding.
-  for (var id in this.pendingReplies_) {
-    this.pendingReplies_[/** @type {number} */(id)].onError(
+  var pendingReplies = this.pendingReplies_;
+  this.pendingReplies_ = {};
+
+  for (var id in pendingReplies) {
+    pendingReplies[/** @type {number} */(id)].onError(
         remoting.Error.UNEXPECTED);
   }
-  this.pendingReplies_ = {};
 }
 
 /**
  * @param {function(string):void} onDone Callback to be called with the
  *     local hostname.
  * @param {function(remoting.Error):void} onError The callback to be triggered
  *     on error.
  * @return {void} Nothing.
  */
 remoting.HostNativeMessaging.prototype.getHostName =
@@ skipping 206 matching lines @@
  *     on error.
  * @return {void} Nothing.
  */
 remoting.HostNativeMessaging.prototype.getCredentialsFromAuthCode =
     function(authorizationCode, onDone, onError) {
   this.postMessage_({
     type: 'getCredentialsFromAuthCode',
     authorizationCode: authorizationCode
   }, onDone, onError);
 };