[Extensions] Isolate ExtensionFunction results_ and error_

chrome/test/data/extensions/api_test/permissions/optional_retain_gesture/background.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.
 
 var fail = chrome.test.callbackFail;
 
 var GESTURE_ERROR = "This function must be called during a user gesture";
 
 function busyLoop(milliseconds) {
   var startTime = new Date().getTime();
@@ skipping 37 matching lines @@
             function(granted) {
               chrome.test.assertTrue(granted);
 
               var request = function() {
                 // The following request will fail if the user gesture is
                 // expired.
                 chrome.permissions.request(
                     {permissions: ['bookmarks']},
                     function(granted1) {
                       if (chrome.runtime.lastError) {
-                        chrome.test.assertFalse(granted1);
+                        chrome.test.assertFalse(!!granted1);
                         chrome.test.assertEq(chrome.runtime.lastError.message,
                                              GESTURE_ERROR);
                         chrome.test.succeed();
                       } else {
                         console.log("Retrying permissions.request in 3 " +
                             "seconds");
                         busyLoop(3000);
                         request();
                       }
                     });
               };
 
               // Wait 2s since the user gesture timeout is 1s.
               busyLoop(2000);
               request();
             }
         );
       });
     }
   ]);
 });