[Sync] Move attachments code out of core/.

components/sync/core/attachments/on_disk_attachment_store.h

Index: components/sync/core/attachments/on_disk_attachment_store.h
diff --git a/components/sync/core/attachments/on_disk_attachment_store.h b/components/sync/core/attachments/on_disk_attachment_store.h
deleted file mode 100644
index 87e66f5d9e4f5f3dda0d1b0f3bef5e83471387e2..0000000000000000000000000000000000000000
--- a/components/sync/core/attachments/on_disk_attachment_store.h
+++ /dev/null
@@ -1,107 +0,0 @@
-// 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_ATTACHMENTS_ON_DISK_ATTACHMENT_STORE_H_
-#define COMPONENTS_SYNC_CORE_ATTACHMENTS_ON_DISK_ATTACHMENT_STORE_H_
-
-#include <memory>
-#include <string>
-
-#include "base/files/file_path.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/threading/non_thread_safe.h"
-#include "components/sync/api/attachments/attachment.h"
-#include "components/sync/api/attachments/attachment_id.h"
-#include "components/sync/api/attachments/attachment_store.h"
-#include "components/sync/api/attachments/attachment_store_backend.h"
-
-namespace attachment_store_pb {
-class RecordMetadata;
-}  // namespace attachment_store_pb
-
-namespace base {
-class SequencedTaskRunner;
-}  // namespace base
-
-namespace leveldb {
-class DB;
-}  // namespace leveldb
-
-namespace syncer {
-
-// On-disk implementation of AttachmentStore. Stores attachments in leveldb
-// database in |path| directory.
-class OnDiskAttachmentStore : public AttachmentStoreBackend,
-                              public base::NonThreadSafe {
- public:
-  // Constructs attachment store.
-  OnDiskAttachmentStore(
-      const scoped_refptr<base::SequencedTaskRunner>& callback_task_runner,
-      const base::FilePath& path);
-  ~OnDiskAttachmentStore() override;
-
-  // AttachmentStoreBackend implementation.
-  void Init(const AttachmentStore::InitCallback& callback) override;
-  void Read(AttachmentStore::Component component,
-            const AttachmentIdList& ids,
-            const AttachmentStore::ReadCallback& callback) override;
-  void Write(AttachmentStore::Component component,
-             const AttachmentList& attachments,
-             const AttachmentStore::WriteCallback& callback) override;
-  void SetReference(AttachmentStore::Component component,
-                    const AttachmentIdList& ids) override;
-  void DropReference(AttachmentStore::Component component,
-                     const AttachmentIdList& ids,
-                     const AttachmentStore::DropCallback& callback) override;
-  void ReadMetadataById(
-      AttachmentStore::Component component,
-      const AttachmentIdList& ids,
-      const AttachmentStore::ReadMetadataCallback& callback) override;
-  void ReadMetadata(
-      AttachmentStore::Component component,
-      const AttachmentStore::ReadMetadataCallback& callback) override;
-
- private:
-  friend class OnDiskAttachmentStoreSpecificTest;
-
-  // Opens leveldb database at |path|, creating it if needed. In the future
-  // upgrade code will be invoked from OpenOrCreate as well. If open fails
-  // result is UNSPECIFIED_ERROR.
-  AttachmentStore::Result OpenOrCreate(const base::FilePath& path);
-  // Reads single attachment from store. Returns nullptr in case of errors.
-  std::unique_ptr<Attachment> ReadSingleAttachment(
-      const AttachmentId& attachment_id,
-      AttachmentStore::Component component);
-  // Writes single attachment to store. Returns false in case of errors.
-  bool WriteSingleAttachment(const Attachment& attachment,
-                             AttachmentStore::Component component);
-  // Reads single attachment_store_pb::RecordMetadata from levelDB into the
-  // provided buffer. Returns false in case of an error.
-  bool ReadSingleRecordMetadata(
-      const AttachmentId& attachment_id,
-      attachment_store_pb::RecordMetadata* record_metadata);
-  // Writes single attachment_store_pb::RecordMetadata to levelDB. Returns false
-  // in case of an error.
-  bool WriteSingleRecordMetadata(
-      const AttachmentId& attachment_id,
-      const attachment_store_pb::RecordMetadata& record_metadata);
-
-  static std::string MakeDataKeyFromAttachmentId(
-      const AttachmentId& attachment_id);
-  static std::string MakeMetadataKeyFromAttachmentId(
-      const AttachmentId& attachment_id);
-  static AttachmentMetadata MakeAttachmentMetadata(
-      const AttachmentId& attachment_id,
-      const attachment_store_pb::RecordMetadata& record_metadata);
-
-  const base::FilePath path_;
-  std::unique_ptr<leveldb::DB> db_;
-
-  DISALLOW_COPY_AND_ASSIGN(OnDiskAttachmentStore);
-};
-
-}  // namespace syncer
-
-#endif  // COMPONENTS_SYNC_CORE_ATTACHMENTS_ON_DISK_ATTACHMENT_STORE_H_