Update sync API to support attachments.

sync/api/attachments/fake_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 "sync/api/attachments/fake_attachment_service.h"
+
+#include "base/test/test_simple_task_runner.h"
+#include "sync/api/attachments/fake_attachment_store.h"
+
+namespace syncer {
+
+FakeAttachmentService::FakeAttachmentService(
+    scoped_ptr<AttachmentStore> attachment_store)
+    : attachment_store_(attachment_store.Pass()) {
+  DCHECK(CalledOnValidThread());
+  DCHECK(attachment_store_);
+}
+
+FakeAttachmentService::~FakeAttachmentService() {
+  DCHECK(CalledOnValidThread());
+}
+
+// Static.
+scoped_ptr<syncer::AttachmentService> FakeAttachmentService::CreateForTest() {
+  scoped_ptr<syncer::AttachmentStore> attachment_store(
+      new syncer::FakeAttachmentStore(scoped_refptr<base::SequencedTaskRunner>(
+          new base::TestSimpleTaskRunner)));
+  scoped_ptr<syncer::AttachmentService> attachment_service(
+      new syncer::FakeAttachmentService(attachment_store.Pass()));
+  return attachment_service.Pass();
+}
+
+void FakeAttachmentService::GetOrDownloadAttachments(
+    const AttachmentIdList& attachment_ids,
+    const GetOrDownloadCallback& callback) {
+  DCHECK(CalledOnValidThread());
+  // TODO(maniscalco): Fire off a bunch of AttachmentStore operations.  Invoke
+  // callback after all have completed (bug 356351).
+}
+
+void FakeAttachmentService::DropAttachments(
+    const AttachmentIdList& attachment_ids,
+    const DropCallback& callback) {
+  DCHECK(CalledOnValidThread());
+  // TODO(maniscalco): Fire off a bunch of AttachmentStore operations.  Invoke
+  // callback after all have completed (bug 356351).
+}
+
+void FakeAttachmentService::OnSyncDataAdd(const SyncData& sync_data) {
+  DCHECK(CalledOnValidThread());
+  // TODO(maniscalco): Ensure the linked attachments get persisted in local
+  // storage and schedule them for upload to the server (bug 356351).
+}
+
+void FakeAttachmentService::OnSyncDataDelete(const SyncData& sync_data) {
+  DCHECK(CalledOnValidThread());
+  // TODO(maniscalco): One or more of sync_data's attachments may no longer be
+  // referenced anywhere. We should probably delete them at this point (bug
+  // 356351).
+}
+
+void FakeAttachmentService::OnSyncDataUpdate(
+    const AttachmentIdList& old_attachment_ids,
+    const SyncData& updated_sync_data) {
+  DCHECK(CalledOnValidThread());
+  // TODO(maniscalco): At this point we need to ensure we write all new
+  // attachments referenced by updated_sync_data to local storage and schedule
+  // them up upload to the server. We also need to remove any no unreferenced
+  // attachments from local storage (bug 356351).
+}
+
+}  // namespace syncer