Refactor preference syncing.

chrome/browser/sync/syncable_service.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_SYNCABLE_SERVICE_H_
+#define CHROME_BROWSER_SYNC_SYNCABLE_SERVICE_H_
+#pragma once
+
+#include "chrome/browser/sync/engine/syncapi.h"  // TODO(zea): remove this.
+#include "chrome/browser/sync/glue/model_associator.h"
+
+class ProfileSyncService;
+
+namespace browser_sync {
+class GenericChangeProcessor;
+}
+
+// TODO(sync): Define SyncData type for passing sync changes here.
+
+// TODO(sync): Have this become an independent class and deprecate
+// AssociatorInterface.
+class SyncableService : public browser_sync::AssociatorInterface {
+ public:
+  SyncableService();
+  virtual ~SyncableService();
+
+  // Future methods for SyncableService:
+  // StartSyncing
+  // StopSyncing
+  // GetAllSyncData
+  // ProcessNewSyncData (replaces ApplyChangeFromSync)
+
+  // TODO(sync): remove these once we switch to the real SyncableService
+  // interface. This just keeps us going while we use the model associator/
+  // change processor way of things.
+
+  // AssociatorInterface implementation.
+  virtual bool AssociateModels() = 0;
+  virtual bool DisassociateModels() = 0;
+  virtual bool SyncModelHasUserCreatedNodes(bool* has_nodes) = 0;
+  virtual void AbortAssociation() = 0;
+  virtual bool CryptoReadyIfNecessary() = 0;
+
+  // Receive changes from change processor (the ChangeRecord dependency is
+  // the reason we must include syncapi.h).
+  virtual void ApplyChangesFromSync(
+      const sync_api::BaseTransaction* trans,
+      const sync_api::SyncManager::ChangeRecord* changes,
+      int change_count) = 0;
+  virtual void SetupSync(
+      ProfileSyncService* sync_service,
+      browser_sync::GenericChangeProcessor* change_processor) = 0;
+};
+
+#endif  // CHROME_BROWSER_SYNC_SYNCABLE_SERVICE_H_