[Sync] Renaming sync/api* to sync/model*.

components/sync/api/data_batch.h

-// Copyright 2015 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_API_DATA_BATCH_H_
-#define COMPONENTS_SYNC_API_DATA_BATCH_H_
-
-#include <algorithm>
-#include <memory>
-#include <string>
-#include <utility>
-
-#include "components/sync/api/entity_data.h"
-
-namespace syncer {
-
-typedef std::pair<std::string, std::unique_ptr<EntityData>> KeyAndData;
-
-// Interface used by the processor to read data requested from the service.
-class DataBatch {
- public:
-  DataBatch() {}
-  virtual ~DataBatch() {}
-
-  // Returns if the data batch has another pair or not.
-  virtual bool HasNext() const = 0;
-
-  // Returns a pair of storage tag and owned entity data object. Invoking this
-  // method will remove the pair from the batch, and should not be called if
-  // HasNext() returns false.
-  virtual KeyAndData Next() = 0;
-};
-
-}  // namespace syncer
-
-#endif  // COMPONENTS_SYNC_API_DATA_BATCH_H_