Check the Argument to the Catch Function

chrome/browser/resources/google_now/background.js

 // Copyright (c) 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.
 
 'use strict';
 
 /**
  * @fileoverview The event page for Google Now for Chrome implementation.
  * The Google Now event page gets Google Now cards from the server and shows
  * them as Chrome notifications.
@@ skipping 800 matching lines @@
     console.log('requestDismissingCard-onloadend ' + request.status);
     if (request.status == HTTP_NOCONTENT)
       recordEvent(GoogleNowEvent.DISMISS_REQUEST_SUCCESS);
 
     // A dismissal doesn't require further retries if it was successful or
     // doesn't have a chance for successful completion.
     return (request.status == HTTP_NOCONTENT) ?
            Promise.resolve() :
            Promise.reject();
   }).catch(function(request) {
+    request = (typeof request === 'object') ? request : {};
     return (request.status == HTTP_BAD_REQUEST ||
            request.status == HTTP_METHOD_NOT_ALLOWED) ?
            Promise.resolve() :
            Promise.reject();
   });
 }
 
 /**
  * Tries to send dismiss requests for all pending dismissals.
  * @return {Promise} A promise to process the pending dismissals.
@@ skipping 530 matching lines @@
             lastPollNowPayloads: items.lastPollNowPayloads,
             notificationGroups: items.notificationGroups
           });
 
           pollOptedInWithRecheck();
         }
       });
     });
   }
 });