Implement new invalidations ack tracking system

sync/tools/null_invalidation_state_tracker.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_TOOLS_NULL_INVALIDATION_STATE_TRACKER_H_
 #define SYNC_TOOLS_NULL_INVALIDATION_STATE_TRACKER_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
 #include "sync/notifier/invalidation_state_tracker.h"
 
 namespace syncer {
 
 class NullInvalidationStateTracker
     : public base::SupportsWeakPtr<NullInvalidationStateTracker>,
       public InvalidationStateTracker {
  public:
   NullInvalidationStateTracker();
   virtual ~NullInvalidationStateTracker();
 
-  virtual InvalidationStateMap GetAllInvalidationStates() const OVERRIDE;
-  virtual void SetMaxVersionAndPayload(const invalidation::ObjectId& id,
-                                       int64 max_invalidation_version,
-                                       const std::string& payload) OVERRIDE;
-  virtual void Forget(const ObjectIdSet& ids) OVERRIDE;
-
   virtual void SetInvalidatorClientId(const std::string& data) OVERRIDE;
   virtual std::string GetInvalidatorClientId() const OVERRIDE;
 
   virtual std::string GetBootstrapData() const OVERRIDE;
   virtual void SetBootstrapData(const std::string& data) OVERRIDE;
 
+  virtual void SetSavedInvalidations(
+      const UnackedInvalidationsMap& states) OVERRIDE;
+  virtual UnackedInvalidationsMap GetSavedInvalidations() const OVERRIDE;
+
   virtual void Clear() OVERRIDE;
-
-  virtual void GenerateAckHandles(
-      const ObjectIdSet& ids,
-      const scoped_refptr<base::TaskRunner>& task_runner,
-      base::Callback<void(const AckHandleMap&)> callback) OVERRIDE;
-  virtual void Acknowledge(const invalidation::ObjectId& id,
-                           const AckHandle& ack_handle) OVERRIDE;
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_TOOLS_NULL_INVALIDATION_STATE_TRACKER_H_