Refactor preference syncing.

chrome/browser/sync/glue/generic_change_processor.h

+// Copyright (c) 2011 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 CHROME_BROWSER_SYNC_GLUE_GENERIC_CHANGE_PROCESSOR_H_
+#define CHROME_BROWSER_SYNC_GLUE_GENERIC_CHANGE_PROCESSOR_H_
+#pragma once
+
+#include "chrome/browser/sync/glue/change_processor.h"
+
+class SyncableService;
+
+namespace browser_sync {
+
+// TODO(sync): Have this become a SyncableService implementation and deprecate
+// ChangeProcessor.
+// For now, it acts as a dummy change processor that just passes all
+// ApplySyncChanges commands onto the local SyncableService..
+class GenericChangeProcessor : public ChangeProcessor {
+ public:
+  GenericChangeProcessor(SyncableService* local_service,
+                         UnrecoverableErrorHandler* error_handler);
+  ~GenericChangeProcessor();
+
+  // ChangeProcessor interface.
+  // Just passes all arguments onto the |local_service_|
+  virtual void ApplyChangesFromSyncModel(
+      const sync_api::BaseTransaction* trans,
+      const sync_api::SyncManager::ChangeRecord* changes,
+      int change_count);
+ protected:
+  // ChangeProcessor interface.
+  virtual void StartImpl(Profile* profile);  // Not implemented.
+  virtual void StopImpl();  // Not implemented.
+ private:
+  SyncableService* local_service_;
+};
+
+}  // namespace browser_sync
+
+#endif  // CHROME_BROWSER_SYNC_GLUE_GENERIC_CHANGE_PROCESSOR_H_