Added method to host daemon to exchange an auth code for just an OAuth

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 276 matching lines @@
       var refreshToken = base.getStringAttr(message, 'refreshToken');
       if (userEmail && refreshToken) {
         return {
           userEmail: userEmail,
           refreshToken: refreshToken
         };
       } else {
         throw 'Missing userEmail or refreshToken';
       }
 
+    case 'getTokenFromAuthCodeResponse':
+      var refreshToken = base.getStringAttr(message, 'refreshToken');
+      if (refreshToken) {
+        return refreshToken;
+      } else {
+        throw 'Missing refreshToken';
+      }
+
     default:
       throw 'Unexpected native message: ' + message;
   }
 };
 
 /**
  * @return {void} Nothing.
  * @private
  */
 remoting.HostDaemonFacade.prototype.onDisconnect_ = function() {
@@ skipping 181 matching lines @@
 /**
  * Gets the API keys to obtain/use service account credentials.
  *
  * @return {!Promise<string>}
  */
 remoting.HostDaemonFacade.prototype.getHostClientId = function() {
   return this.postMessage_({type: 'getHostClientId'});
 };
 
 /**
- *
  * @param {string} authorizationCode OAuth authorization code.
  * @return {!Promise<{remoting.XmppCredentials}>}
  */
 remoting.HostDaemonFacade.prototype.getCredentialsFromAuthCode =
     function(authorizationCode) {
   return this.postMessage_({
     type: 'getCredentialsFromAuthCode',
     authorizationCode: authorizationCode
   });
 };
+
+/**
+ * @param {string} authorizationCode OAuth authorization code.
+ * @return {!Promise<string>}
+ */
+remoting.HostDaemonFacade.prototype.getTokenFromAuthCode =
+    function(authorizationCode) {
+  return this.postMessage_({
+    type: 'getTokenFromAuthCode',
+    authorizationCode: authorizationCode
+  });
+};