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"
+
+namespace browser_sync {
+
+class NewAssociatorInterface;
+
+// TODO(zea): extract common change processor functionality into this class
+// and have all new associator's use it. Eventually we want all sync_api
+// interaction to happen within this change processor, and have the model
+// associator's just process protobuf specifics.
+// For now, it acts as a dummy change processor that just passes all
+// ApplySyncChanges commands onto it's model associator.
+class GenericChangeProcessor : public ChangeProcessor {
+ public:
+  GenericChangeProcessor(UnrecoverableErrorHandler* error_handler,
+                         NewAssociatorInterface* model_associator);
+  ~GenericChangeProcessor();
+
+  // ChangeProcessor interface.
+  // Just passes all arguments onto the |model_associator_|
+  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:
+  NewAssociatorInterface* model_associator_;
+};
+
+}  // namespace browser_sync
+
+#endif  // CHROME_BROWSER_SYNC_GLUE_GENERIC_CHANGE_PROCESSOR_H_