Add a test for Notification.permission.

chrome/test/data/notifications/notification_tester.html

Index: chrome/test/data/notifications/notification_tester.html
diff --git a/chrome/test/data/notifications/notification_tester.html b/chrome/test/data/notifications/notification_tester.html
index 2cfc5f6a39eba7cd5756d9306049646786a48f85..769c24316d7d30bfff27d66b5675151489bc5721 100644
--- a/chrome/test/data/notifications/notification_tester.html
+++ b/chrome/test/data/notifications/notification_tester.html
@@ -53,6 +53,12 @@ function requestPermission() {
   Notification.requestPermission(permissionCallbackWithResponse);
 }
 
+// Checks the notification permission status. The result will be sent directly
+// via permissionCallbackWithResponse.
+function queryPermissionStatus() {
+  sendResultToTest(Notification.permission);
+}
+
 // Callback for requestPermissionAndRespond. Will send the permission status to
 // the test driver.
 function permissionCallbackWithResponse(permissionStatus) {