Don't revoke tokens on logout.

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 191 matching lines @@
             result['data']['authorizationCode'],
             onServiceAccountCredentials.bind(
                 null, hostName, publicKey, privateKey),
             onError);
       } else {
         // No authorization code returned, use regular user credential flow.
         that.hostDispatcher_.getPinHash(
             newHostId, hostPin, startHostWithHash.bind(
                 null, hostName, publicKey, privateKey,
                 remoting.identity.getCachedEmail(),
-                remoting.oauth2.exportRefreshToken()),
+                remoting.oauth2.getRefreshToken()),
           onError);
       }
     } else {
       console.log('Failed to register the host. Status: ' + xhr.status +
                   ' response: ' + xhr.responseText);
       onError(remoting.Error.REGISTRATION_FAILED);
     }
   }
 
   /**
@@ skipping 244 matching lines @@
  * @param {function(remoting.Error):void} onError Error callback.
  * @return {void}
  */
 remoting.HostController.prototype.clearPairedClients = function(
     onDone, onError) {
   this.hostDispatcher_.clearPairedClients(onDone, onError);
 };
 
 /** @type {remoting.HostController} */
 remoting.hostController = null;