BackgroundSyncManager tracks client registrations

content/test/data/background_sync/sync_event_rejected.js

Index: content/test/data/background_sync/sync_event_rejected.js
diff --git a/content/test/data/background_sync/sync_event_rejected.js b/content/test/data/background_sync/sync_event_rejected.js
deleted file mode 100644
index ca697165403279bc42fc75240715ede4fd6972ca..0000000000000000000000000000000000000000
--- a/content/test/data/background_sync/sync_event_rejected.js
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2015 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.
-
-this.onsync = function(event) {
-    if (!('waitUntil' in event)) {
-      console.log("waitUntil missing on event");
-      return;
-    }
-    event.waitUntil(new Promise(function(resolve, reject) {
-        setTimeout(function() {
-          console.log('Rejecting onsync event');
-          reject();
-        }, 5);
-    }));
-};