Implement sync in the NonBlockingTypeProcessor

sync/internal_api/sync_core_proxy_impl.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_SYNC_CORE_PROXY_IMPL_H_
 #define SYNC_INTERNAL_API_SYNC_CORE_PROXY_IMPL_H_
 
 #include "base/memory/scoped_ptr.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"
 #include "sync/internal_api/public/sync_core_proxy.h"
 
 namespace syncer {
 
 class SyncCore;
 class NonBlockingTypeProcessor;
+struct DataTypeState;
 
 // Encapsulates a reference to the sync core and the thread it's running on.
 // Used by sync's data types to connect with the sync core.
 //
 // It is epxected that this object will be copied to and used on many different
 // threads.  It is small and safe to pass by value.
 class SYNC_EXPORT_PRIVATE SyncCoreProxyImpl : public SyncCoreProxy {
  public:
   SyncCoreProxyImpl(
       scoped_refptr<base::SequencedTaskRunner> sync_task_runner,
       base::WeakPtr<SyncCore> sync_core);
   virtual ~SyncCoreProxyImpl();
 
   // Attempts to connect a non-blocking type to the sync core.
   //
   // This may fail under some unusual circumstances, like shutdown.  Due to the
   // nature of WeakPtrs and cross-thread communication, the caller will be
   // unable to distinguish a slow success from failure.
   //
   // Must be called from the thread where the data type lives.
   virtual void ConnectTypeToCore(
       syncer::ModelType type,
+      const DataTypeState& data_type_state,
       base::WeakPtr<NonBlockingTypeProcessor> type_processor) OVERRIDE;
 
   // Disables syncing for the given type on the sync thread.
   virtual void Disconnect(syncer::ModelType type) OVERRIDE;
 
   virtual scoped_ptr<SyncCoreProxy> Clone() const OVERRIDE;
 
  private:
   // A SequencedTaskRunner representing the thread where the SyncCore lives.
   scoped_refptr<base::SequencedTaskRunner> sync_task_runner_;
 
   // The SyncCore this object is wrapping.
   base::WeakPtr<SyncCore> sync_core_;
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_SYNC_CORE_PROXY_IMPL_H_