Implement sync in the NonBlockingTypeProcessor

sync/internal_api/sync_core.h

 // Copyright 2014 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_CORE_H_
 #define SYNC_INTERNAL_API_PUBLIC_SYNC_CORE_H_
 
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
 #include "base/sequenced_task_runner.h"
 #include "sync/base/sync_export.h"
 #include "sync/internal_api/public/base/model_type.h"
 
 namespace syncer {
 
 class ModelTypeRegistry;
 class NonBlockingTypeProcessor;
+struct DataTypeState;
 
 // An interface of the core parts of sync.
 //
 // In theory, this is the component that provides off-thread sync types with
 // functionality to schedule and execute communication with the sync server.  In
 // practice, this class delegates most of the responsibilty of implemeting this
 // functionality to other classes, and most of the interface is exposed not
 // directly here but instead through a per-ModelType class that this class helps
 // instantiate.
 class SYNC_EXPORT_PRIVATE SyncCore {
  public:
   explicit SyncCore(ModelTypeRegistry* model_type_registry);
   ~SyncCore();
 
   // Initializes the connection between the sync core and its delegate on the
   // sync client's thread.
   void ConnectSyncTypeToCore(
-    syncer::ModelType type,
-    scoped_refptr<base::SequencedTaskRunner> datatype_task_runner,
-    base::WeakPtr<NonBlockingTypeProcessor> sync_client);
+      syncer::ModelType type,
+      const DataTypeState& data_type_state,
+      scoped_refptr<base::SequencedTaskRunner> datatype_task_runner,
+      base::WeakPtr<NonBlockingTypeProcessor> sync_client);
 
   // Disconnects the syncer from the model and stops syncing the type.
   //
   // By the time this is called, the model thread should have already
   // invalidated the WeakPtr it sent to us in the connect request.  Any
   // messages sent to that NonBlockingTypeProcessor will not be recived.
   //
   // This is the sync thread's chance to clear state associated with the type.
   // It also causes the syncer to stop requesting updates for this type, and to
   // abort any in-progress commit requests.
   void Disconnect(ModelType type);
 
   base::WeakPtr<SyncCore> AsWeakPtr();
 
  private:
   ModelTypeRegistry* model_type_registry_;
   base::WeakPtrFactory<SyncCore> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncCore);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_SYNC_CORE_H_