[Extensions] Isolate ExtensionFunction results_ and error_

chrome/test/data/extensions/api_test/permissions/host_subsets/background.js

 // Copyright 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.
 
 var ERROR = 'Optional permissions must be listed in extension manifest.';
 var test = chrome.test;
 
 // The URL patterns that we've supposedly been granted access to so far. Use
 // this to verify queried hosts for each test.
 var grantedHosts = [];
@@ skipping 47 matching lines @@
     chrome.permissions.request({origins: [host]},
                                test.callback(function(granted) {
       if (granted)
         pushUniqueValue(grantedHosts, host);
       if (expectedGranted) {
         test.assertTrue(
             granted,
             "Access to " + host + " was not granted, but should have been");
       } else {
         test.assertFalse(
-            granted,
+            !!granted,
             "Access to " + host + " was granted, but should not have been");
       }
       checkGrantedHosts(callback);
     }, expectedError));
   };
 }
 
 // Returns a function which removes access to a host, and afterwards checks
 // that our expected host permissions agree with Chrome's.
 function removeHost(host, expectedRemoved) {
@@ skipping 105 matching lines @@
      requestHost('ftp://ftp.example.com/*', true),
         contains('ftp://ftp.example.com/*', true),
       removeHost('ftp://ftp.example.com/*', true),
         contains('ftp://ftp.example.com/*', false),
 
                  // And finally...
                  test.succeed]);
 }
 
 test.runTests([main]);