Fix http/tests/notifications/notification-properties.html

LayoutTests/http/tests/notifications/notification-properties.html

Index: LayoutTests/http/tests/notifications/notification-properties.html
diff --git a/LayoutTests/http/tests/notifications/notification-properties.html b/LayoutTests/http/tests/notifications/notification-properties.html
index 7e02473d68739bdca4ba3da1a38184e35ac3a928..fb16602e6f5adf2b6780f722574df1cbba5c8c75 100644
--- a/LayoutTests/http/tests/notifications/notification-properties.html
+++ b/LayoutTests/http/tests/notifications/notification-properties.html
@@ -26,7 +26,7 @@
             // Deliberately add more actions than are supported.
             for (var i = 0; i < 2 * Notification.maxActions; i++) {
                 options.actions.push({
-                    action: i,
+                    action: "" + i,
                     title: "Action " + i
                 });
             }