Implement Invalidator::Acknowledge

sync/internal_api/public/sync_manager.h

 // Copyright (c) 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.
 
 #ifndef SYNC_INTERNAL_API_PUBLIC_SYNC_MANAGER_H_
 #define SYNC_INTERNAL_API_PUBLIC_SYNC_MANAGER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 336 matching lines @@
 
   // Forwards to the underlying notifier (see comments in invalidator.h).
   virtual void UpdateRegisteredInvalidationIds(
       InvalidationHandler* handler,
       const ObjectIdSet& ids) = 0;
 
   // Forwards to the underlying notifier (see comments in invalidator.h).
   virtual void UnregisterInvalidationHandler(
       InvalidationHandler* handler) = 0;
 
+  // Forwards to the underlying notifier (see comments in invalidator.h).
+  virtual void AcknowledgeInvalidation(
+      const invalidation::ObjectId& id,
+      const syncer::AckHandle& ack_handle) = 0;
+
   // Put the syncer in normal mode ready to perform nudges and polls.
   virtual void StartSyncingNormally(
       const ModelSafeRoutingInfo& routing_info) = 0;
 
   // Switches the mode of operation to CONFIGURATION_MODE and performs
   // any configuration tasks needed as determined by the params. Once complete,
   // syncer will remain in CONFIGURATION_MODE until StartSyncingNormally is
   // called.
   // |ready_task| is invoked when the configuration completes.
   // |retry_task| is invoked if the configuration job could not immediately
@@ skipping 49 matching lines @@
   // any remaining unsynced items.  May be called on any thread.
   virtual bool HasUnsyncedItems() = 0;
 
   // Returns the SyncManager's encryption handler.
   virtual SyncEncryptionHandler* GetEncryptionHandler() = 0;
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_SYNC_MANAGER_H_