Implement Invalidator::Acknowledge

sync/notifier/non_blocking_invalidator.h

 // Copyright 2012 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.
 //
 // An implementation of SyncNotifier that wraps InvalidationNotifier
 // on its own thread.
 
 #ifndef SYNC_NOTIFIER_NON_BLOCKING_INVALIDATOR_H_
 #define SYNC_NOTIFIER_NON_BLOCKING_INVALIDATOR_H_
 
@@ skipping 33 matching lines @@
           invalidation_state_tracker,
       const std::string& client_info);
 
   virtual ~NonBlockingInvalidator();
 
   // Invalidator implementation.
   virtual void RegisterHandler(InvalidationHandler* handler) OVERRIDE;
   virtual void UpdateRegisteredIds(InvalidationHandler* handler,
                                    const ObjectIdSet& ids) OVERRIDE;
   virtual void UnregisterHandler(InvalidationHandler* handler) OVERRIDE;
+  virtual void Acknowledge(const invalidation::ObjectId& id,
+                           const AckHandle& ack_handle) OVERRIDE;
   virtual InvalidatorState GetInvalidatorState() const OVERRIDE;
   virtual void SetUniqueId(const std::string& unique_id) OVERRIDE;
   virtual void UpdateCredentials(
       const std::string& email, const std::string& token) OVERRIDE;
   virtual void SendInvalidation(
       const ObjectIdInvalidationMap& invalidation_map) OVERRIDE;
 
   // InvalidationHandler implementation.
   virtual void OnInvalidatorStateChange(InvalidatorState state) OVERRIDE;
   virtual void OnIncomingInvalidation(
@@ skipping 11 matching lines @@
   scoped_refptr<Core> core_;
   scoped_refptr<base::SingleThreadTaskRunner> parent_task_runner_;
   scoped_refptr<base::SingleThreadTaskRunner> network_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(NonBlockingInvalidator);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_NOTIFIER_NON_BLOCKING_INVALIDATOR_H_