[Sync] Move ModelTypeProcessor* and rename *Impl to Shared*.

sync/engine/model_type_processor.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_ENGINE_MODEL_TYPE_PROCESSOR_H_
-#define SYNC_ENGINE_MODEL_TYPE_PROCESSOR_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "sync/base/sync_export.h"
-#include "sync/engine/commit_queue.h"
-#include "sync/internal_api/public/non_blocking_sync_common.h"
-
-namespace syncer_v2 {
-
-// Interface used by sync backend to issue requests to a synced data type.
-class SYNC_EXPORT_PRIVATE ModelTypeProcessor {
- public:
-  ModelTypeProcessor();
-  virtual ~ModelTypeProcessor();
-
-  // Callback used to process the handshake response.
-  virtual void OnConnect(scoped_ptr<CommitQueue> commit_queue) = 0;
-
-  // Informs this object that some of its commit requests have been
-  // successfully serviced.
-  virtual void OnCommitCompleted(
-      const DataTypeState& type_state,
-      const CommitResponseDataList& response_list) = 0;
-
-  // Informs this object that there are some incoming updates is should
-  // handle.
-  virtual void OnUpdateReceived(
-      const DataTypeState& type_state,
-      const UpdateResponseDataList& response_list,
-      const UpdateResponseDataList& pending_updates) = 0;
-};
-
-}  // namespace syncer
-
-#endif  // SYNC_ENGINE_MODEL_TYPE_PROCESSOR_H_