[Sync] Move attachments code out of core/.

components/sync/api/attachments/attachment_service.cc

+// 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.
+
+#include "components/sync/api/attachments/attachment_service.h"
+
+#include <utility>
+
+#include "base/memory/ptr_util.h"
+#include "components/sync/api/attachments/attachment_store.h"
+#include "components/sync/api_impl/attachments/attachment_service_impl.h"
+#include "components/sync/engine/attachments/fake_attachment_downloader.h"
+#include "components/sync/engine/attachments/fake_attachment_uploader.h"
+
+namespace syncer {
+
+// static
+std::unique_ptr<AttachmentService> AttachmentService::Create(
+    std::unique_ptr<AttachmentStoreForSync> attachment_store,
+    std::unique_ptr<AttachmentUploader> attachment_uploader,
+    std::unique_ptr<AttachmentDownloader> attachment_downloader,
+    Delegate* delegate,
+    const base::TimeDelta& initial_backoff_delay,
+    const base::TimeDelta& max_backoff_delay) {
+  return base::MakeUnique<AttachmentServiceImpl>(
+      std::move(attachment_store), std::move(attachment_uploader),
+      std::move(attachment_downloader), delegate, initial_backoff_delay,
+      max_backoff_delay);
+}
+
+// static
+std::unique_ptr<AttachmentService> AttachmentService::CreateForTest() {
+  std::unique_ptr<AttachmentStore> attachment_store =
+      AttachmentStore::CreateInMemoryStore();
+  return base::MakeUnique<AttachmentServiceImpl>(
+      attachment_store->CreateAttachmentStoreForSync(),
+      base::MakeUnique<FakeAttachmentUploader>(),
+      base::MakeUnique<FakeAttachmentDownloader>(), nullptr, base::TimeDelta(),
+      base::TimeDelta());
+}
+
+AttachmentService::~AttachmentService() {}
+
+}  // namespace syncer