Pass error messages from native messaging to web-app.

remoting/webapp/crd/js/it2me_host_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 It2me Host component via Native Messaging.
  */
 
 /** @suppress {duplicate} */
@@ skipping 43 matching lines @@
    * missing required attributes, attributes with incorrect types, etc.
    * @private {?function(!remoting.Error):void}
    */
   this.onError_ = function(error) {};
 
   /** @private {?function(remoting.HostSession.State):void} */
   this.onStateChanged_ = function() {};
 
   /** @private {?function(boolean):void} */
   this.onNatPolicyChanged_ = function() {};
+
+  /** @private */
+  this.debugMessageHandler_ =
+      new remoting.NativeMessageHostDebugMessageHandler();
+
 };
 
 remoting.It2MeHostFacade.prototype.dispose = function() {
   base.dispose(this.eventHooks_);
   this.eventHooks_ = null;
   if (this.port_) {
     this.port_.disconnect();
     this.port_ = null;
   }
 };
@@ skipping 127 matching lines @@
 
 /**
  * Handler for incoming messages.
  *
  * @param {Object} message The received message.
  * @return {void}
  * @private
  */
 remoting.It2MeHostFacade.prototype.onIncomingMessage_ =
     function(message) {
+  if (this.debugMessageHandler_.handleMessage(message)) {
+    return;
+  }
+
   var type = base.getStringAttr(message, 'type');
 
   switch (type) {
     case 'helloResponse':
       var version = base.getStringAttr(message, 'version');
       console.log('Host version: ', version);
       this.initialized_ = true;
       // A "hello" request is sent immediately after the native messaging host
       // is started. We can proceed to the next task once we receive the
       // "helloReponse".
@@ skipping 95 matching lines @@
                 chrome.runtime.lastError.message);
     this.onInitializationFailed_();
   } else {
     console.error('Native Messaging port disconnected.');
     this.port_ = null;
     this.onError_(remoting.Error.unexpected());
   }
 };
 
 })();