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

content/child/background_sync/background_sync_provider.cc

 // 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.
 
 #include "content/child/background_sync/background_sync_provider.h"
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/child/background_sync/background_sync_type_converters.h"
 #include "content/child/service_worker/web_service_worker_registration_impl.h"
@@ skipping 22 matching lines @@
     : service_registry_(service_registry) {
   DCHECK(service_registry);
 }
 
 BackgroundSyncProvider::~BackgroundSyncProvider() {
 }
 
 void BackgroundSyncProvider::registerBackgroundSync(
     const blink::WebSyncRegistration* options,
     blink::WebServiceWorkerRegistration* service_worker_registration,
+    bool requested_from_service_worker,
     blink::WebSyncRegistrationCallbacks* callbacks) {
   DCHECK(options);
   DCHECK(service_worker_registration);
   DCHECK(callbacks);
   int64 service_worker_registration_id =
       GetServiceWorkerRegistrationId(service_worker_registration);
   scoped_ptr<const blink::WebSyncRegistration> optionsPtr(options);
   scoped_ptr<blink::WebSyncRegistrationCallbacks> callbacksPtr(callbacks);
 
   // base::Unretained is safe here, as the mojo channel will be deleted (and
   // will wipe its callbacks) before 'this' is deleted.
   GetBackgroundSyncServicePtr()->Register(
       mojo::ConvertTo<SyncRegistrationPtr>(*(optionsPtr.get())),
-      service_worker_registration_id,
+      service_worker_registration_id, requested_from_service_worker,
       base::Bind(&BackgroundSyncProvider::RegisterCallback,
                  base::Unretained(this), base::Passed(callbacksPtr.Pass())));
 }
 
 void BackgroundSyncProvider::unregisterBackgroundSync(
     blink::WebSyncRegistration::Periodicity periodicity,
     int64_t id,
     const blink::WebString& tag,
     blink::WebServiceWorkerRegistration* service_worker_registration,
     blink::WebSyncUnregistrationCallbacks* callbacks) {
@@ skipping 247 matching lines @@
 BackgroundSyncServicePtr&
 BackgroundSyncProvider::GetBackgroundSyncServicePtr() {
   if (!background_sync_service_.get()) {
     service_registry_->ConnectToRemoteService(
         mojo::GetProxy(&background_sync_service_));
   }
   return background_sync_service_;
 }
 
 }  // namespace content