Reland of [Background Sync] Allow sync manager access from uncontrolled clients

content/child/background_sync/background_sync_provider.h

 // 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.
 
 #ifndef CONTENT_CHILD_BACKGROUND_SYNC_BACKGROUND_SYNC_PROVIDER_H_
 #define CONTENT_CHILD_BACKGROUND_SYNC_BACKGROUND_SYNC_PROVIDER_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 13 matching lines @@
 class BackgroundSyncProvider : public blink::WebSyncProvider {
  public:
   explicit BackgroundSyncProvider(ServiceRegistry* service_registry);
 
   ~BackgroundSyncProvider() override;
 
   // blink::WebSyncProvider implementation
   void registerBackgroundSync(
       const blink::WebSyncRegistration* options,
       blink::WebServiceWorkerRegistration* service_worker_registration,
+      bool requested_from_service_worker,
       blink::WebSyncRegistrationCallbacks* callbacks);
   void unregisterBackgroundSync(
       blink::WebSyncRegistration::Periodicity periodicity,
       int64_t id,
       const blink::WebString& tag,
       blink::WebServiceWorkerRegistration* service_worker_registration,
       blink::WebSyncUnregistrationCallbacks* callbacks);
   void getRegistration(
       blink::WebSyncRegistration::Periodicity,
       const blink::WebString& tag,
@@ skipping 35 matching lines @@
 
   ServiceRegistry* service_registry_;
   BackgroundSyncServicePtr background_sync_service_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundSyncProvider);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_BACKGROUND_SYNC_BACKGROUND_SYNC_PROVIDER_H_