Implement new SyncAPI and convert Preferences to it.

chrome/browser/sync/api/sync_data.cc

+// Copyright (c) 2011 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 "chrome/browser/sync/api/sync_data.h"
+
+RefCountedSyncEntity::RefCountedSyncEntity(sync_pb::SyncEntity* sync_entity) {
+  sync_entity_.reset(sync_entity);

[akalin, 2011/05/19 00:58:45]

Is there a swap method we could use instead?

[Nicolas Zea, 2011/05/19 21:17:45]

Done.

[akalin, 2011/05/20 00:19:39]

I meant a swap for the protocol buffer itself.  So you'd do:

sync_entity_->Swap(sync_entity);

which would effectively reset the argument.

+}
+
+const sync_pb::SyncEntity& RefCountedSyncEntity::sync_entity() {
+  return *sync_entity_;
+}
+
+RefCountedSyncEntity::~RefCountedSyncEntity() {}
+
+
+SyncData::SyncData()
+    : is_local_(true) {
+}
+
+SyncData::~SyncData() {
+}
+
+// Static.
+SyncData SyncData::CreateLocalData(const std::string& sync_tag) {
+  scoped_ptr<sync_pb::SyncEntity> entity(new sync_pb::SyncEntity);
+  entity->set_client_defined_unique_tag(sync_tag);
+  SyncData a;
+  a.shared_entity_ = new RefCountedSyncEntity(entity.release());
+  a.is_local_ = true;
+  return a;
+}
+
+// Static.
+SyncData SyncData::CreateLocalData(
+    const std::string& sync_tag,
+    const sync_pb::EntitySpecifics& specifics) {
+  scoped_ptr<sync_pb::SyncEntity> entity(new sync_pb::SyncEntity);
+  entity->set_client_defined_unique_tag(sync_tag);
+  entity->mutable_specifics()->CopyFrom(specifics);
+  SyncData a;
+  a.shared_entity_ = new RefCountedSyncEntity(entity.release());
+  a.is_local_ = true;
+  return a;
+}
+
+// Static.
+SyncData SyncData::CreateRemoteData(const sync_pb::SyncEntity& entity) {
+  // TODO(zea): eventually use this for building events from the original sync
+  // entities if possible.
+  NOTIMPLEMENTED();
+  return SyncData();
+}
+
+// Static.
+SyncData SyncData::CreateRemoteData(
+    const sync_pb::EntitySpecifics& specifics) {
+  scoped_ptr<sync_pb::SyncEntity> entity(new sync_pb::SyncEntity);
+  entity->mutable_specifics()->CopyFrom(specifics);
+  SyncData a;
+  a.shared_entity_ = new RefCountedSyncEntity(entity.release());
+  a.is_local_ = false;
+  return a;
+}
+
+bool SyncData::IsValid() const {
+  return (shared_entity_.get() != NULL);
+}
+
+const sync_pb::EntitySpecifics& SyncData::GetSpecifics() const {
+  return shared_entity_->sync_entity().specifics();
+}
+
+syncable::ModelType SyncData::GetDataType() const {
+  return syncable::GetModelTypeFromSpecifics(GetSpecifics());
+}
+
+const std::string& SyncData::GetTag() const {
+  DCHECK(is_local_);
+  return shared_entity_->sync_entity().client_defined_unique_tag();
+}
+
+bool SyncData::IsLocal() const {
+  return is_local_;
+}