Pass error messages from native messaging to web-app.

remoting/webapp/crd/js/host_daemon_facade.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
  * Class to communicate with the host daemon via Native Messaging.
  */
 
 'use strict';
@@ skipping 32 matching lines @@
 
   /** @private {!remoting.Error} */
   this.error_ = remoting.Error.none();
 
   /** @private */
   this.onIncomingMessageCallback_ = this.onIncomingMessage_.bind(this);
 
   /** @private */
   this.onDisconnectCallback_ = this.onDisconnect_.bind(this);
 
+  /** @private */
+  this.debugMessageHandler_ =
+      new remoting.NativeMessageHostDebugMessageHandler();
+
   this.initialize_();
 };
 
 /**
  * @return {Promise} A promise that fulfills when the daemon finishes
  *     initializing
  * @private
  */
 remoting.HostDaemonFacade.prototype.initialize_ = function() {
   if (!this.initializingPromise_) {
@@ skipping 110 matching lines @@
 };
 
 /**
  * Handler for incoming Native Messages.
  *
  * @param {Object} message The received message.
  * @return {void} Nothing.
  * @private
  */
 remoting.HostDaemonFacade.prototype.onIncomingMessage_ = function(message) {
+  if (this.debugMessageHandler_.handleMessage(message)) {
+    return;
+  }
+
   /** @type {number} */
   var id = message['id'];
   if (typeof(id) != 'number') {
     console.error('NativeMessaging: missing or non-numeric id');
     return;
   }
   var reply = this.pendingReplies_[id];
   if (!reply) {
     console.error('NativeMessaging: unexpected id: ', id);
     return;
@@ skipping 285 matching lines @@
     authorizationCode: authorizationCode
   }).then(function(reply) {
     var refreshToken = base.getStringAttr(reply, 'refreshToken');
     if (refreshToken) {
       return refreshToken
     } else {
       throw remoting.Error.unexpected('Missing refreshToken');
     }
   });
 };