[Background Sync] Align exposed API with spec

third_party/WebKit/Source/modules/background_sync/SyncCallbacks.cpp

 // 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 "config.h"
 #include "modules/background_sync/SyncCallbacks.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "modules/background_sync/SyncError.h"
 #include "modules/background_sync/SyncRegistration.h"
@@ skipping 102 matching lines @@
     ASSERT(m_resolver);
     ASSERT(m_serviceWorkerRegistration);
 }
 
 SyncGetRegistrationsCallbacks::~SyncGetRegistrationsCallbacks()
 {
 }
 
 void SyncGetRegistrationsCallbacks::onSuccess(const WebVector<WebSyncRegistration*>& webSyncRegistrations)
 {
-    Vector<OwnPtr<WebSyncRegistration>> registrations;
-    for (WebSyncRegistration* r : webSyncRegistrations) {
-        registrations.append(adoptPtr(r));
-    }
     if (!m_resolver->executionContext() || m_resolver->executionContext()->activeDOMObjectsAreStopped()) {
         return;
     }
-
-    HeapVector<Member<SyncRegistration>> syncRegistrations;
-    for (auto& r : registrations) {
-        SyncRegistration* reg = SyncRegistration::take(m_resolver.get(), r.release(), m_serviceWorkerRegistration);
-        syncRegistrations.append(reg);
+    Vector<String> tags;
+    for (const WebSyncRegistration* r : webSyncRegistrations) {
+        tags.append(r->tag);
     }
-    m_resolver->resolve(syncRegistrations);
+    m_resolver->resolve(tags);
 }
 
 void SyncGetRegistrationsCallbacks::onError(const WebSyncError& error)
 {
     if (!m_resolver->executionContext() || m_resolver->executionContext()->activeDOMObjectsAreStopped()) {
         return;
     }
     m_resolver->reject(SyncError::take(m_resolver.get(), error));
 }
 
@@ skipping 36 matching lines @@
         return "denied";
     case WebSyncPermissionStatusPrompt:
         return "prompt";
     }
 
     ASSERT_NOT_REACHED();
     return "denied";
 }
 
 } // namespace blink