Cleanups to the refactored extension activity log code

chrome/test/data/extensions/api_test/activity_log_private/test/test.js

Index: chrome/test/data/extensions/api_test/activity_log_private/test/test.js
diff --git a/chrome/test/data/extensions/api_test/activity_log_private/test/test.js b/chrome/test/data/extensions/api_test/activity_log_private/test/test.js
index cf7af969256ddea05551a96ad58d8d2ea872f10e..45b5f8cfdbb304805567a320e25de6cbdc3af4d3 100644
--- a/chrome/test/data/extensions/api_test/activity_log_private/test/test.js
+++ b/chrome/test/data/extensions/api_test/activity_log_private/test/test.js
@@ -189,9 +189,7 @@ testCases.push({
                                'api_tab_updated_incognito',
                                function response() { });
   },
-  // TODO(mvrable): set this back to true to test the URL values when incognito
-  // cleaning is working correctly for HTMLDocument.write (crbug.com/253368).
-  is_incognito: false,
+  is_incognito: true,
   expected_activity: [
     'windows.create',
     'tabs.onUpdated',
@@ -299,9 +297,7 @@ testCases.push({
                                'dom_tab_updated_incognito',
                                function response() { });
   },
-  // TODO(mvrable): set this back to true to test the URL values when incognito
-  // cleaning is working correctly for DOM logging (crbug.com/253368).
-  is_incognito: false,
+  is_incognito: true,
   expected_activity: domExpectedActivityIncognito
 });