Update sync API to support attachments.

sync/api/attachments/fake_attachment_service.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_API_ATTACHMENTS_FAKE_ATTACHMENT_SERVICE_H_
+#define SYNC_API_ATTACHMENTS_FAKE_ATTACHMENT_SERVICE_H_
+
+#include "sync/api/attachments/attachment_service.h"
+#include "sync/api/attachments/attachment_store.h"
+
+namespace syncer {
+
+// A fake implementation of AttachmentService.
+class SYNC_EXPORT FakeAttachmentService : public AttachmentService {
+ public:
+  explicit FakeAttachmentService(scoped_ptr<AttachmentStore> attachment_store);
+  virtual ~FakeAttachmentService();
+
+  // Create a FakeAttachmentService suitable for use in tests.
+  static scoped_ptr<syncer::AttachmentService> CreateForTest();
+
+  // AttachmentService implementation.
+  virtual void GetAttachments(const AttachmentIdList& attachment_ids,
+                              const GetCallback& callback) OVERRIDE;
+  virtual void DropAttachments(const AttachmentIdList& attachment_ids,
+                               const DropCallback& callback) OVERRIDE;
+  virtual void OnSyncDataAdd(const SyncData& sync_data) OVERRIDE;
+  virtual void OnSyncDataDelete(const SyncData& sync_data) OVERRIDE;
+  virtual void OnSyncDataUpdate(const AttachmentIdList& old_attachment_ids,
+                                const SyncData& updated_sync_data) OVERRIDE;
+
+ private:
+  const scoped_ptr<AttachmentStore> attachment_store_;
+
+  DISALLOW_COPY_AND_ASSIGN(FakeAttachmentService);
+};
+
+}  // namespace syncer
+
+#endif  // SYNC_API_ATTACHMENTS_FAKE_ATTACHMENT_SERVICE_H_