[Sync] Move the last things out of core/.

components/sync/core/model_type_connector.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 COMPONENTS_SYNC_CORE_MODEL_TYPE_CONNECTOR_H_
-#define COMPONENTS_SYNC_CORE_MODEL_TYPE_CONNECTOR_H_
-
-#include <memory>
-
-#include "components/sync/base/model_type.h"
-
-namespace syncer {
-struct ActivationContext;
-
-// An interface into the core parts of sync for USS model types. Handles
-// creating the connection between the ModelTypeWorker (CommitQueue) on the sync
-// side and the (Shared)ModelTypeProcessor on the model type side.
-class ModelTypeConnector {
- public:
-  ModelTypeConnector();
-  virtual ~ModelTypeConnector();
-
-  // Connect a worker on the sync thread and |type|'s processor on the model
-  // thread. Note that in production |activation_context| actually owns a
-  // processor proxy that forwards calls to the model thread and is safe to call
-  // from the sync thread.
-  virtual void ConnectType(
-      ModelType type,
-      std::unique_ptr<ActivationContext> activation_context) = 0;
-
-  // Disconnects the worker from |type|'s processor and stop syncing the type.
-  //
-  // 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.
-  virtual void DisconnectType(ModelType type) = 0;
-};
-
-}  // namespace syncer
-
-#endif  // COMPONENTS_SYNC_CORE_MODEL_TYPE_CONNECTOR_H_