Revert of [sync] Replace FakeServer's implementation with LoopbackServer invocations.

components/sync/test/fake_server/permanent_entity.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/test/fake_server/permanent_entity.h"
+
+#include "base/logging.h"
+#include "base/memory/ptr_util.h"
+
+using std::string;
+using syncer::ModelType;
+
+// The parent tag for children of the root entity. Entities with this parent are
+// referred to as top level enities.
+static const char kRootParentTag[] = "0";
+
+namespace fake_server {
+
+PermanentEntity::~PermanentEntity() {}
+
+// static
+std::unique_ptr<FakeServerEntity> PermanentEntity::Create(
+    const ModelType& model_type,
+    const string& server_tag,
+    const string& name,
+    const string& parent_server_tag) {
+  CHECK(model_type != syncer::UNSPECIFIED) << "The entity's ModelType is "
+                                           << "invalid.";
+  CHECK(!server_tag.empty()) << "A PermanentEntity must have a server tag.";
+  CHECK(!name.empty()) << "The entity must have a non-empty name.";
+  CHECK(!parent_server_tag.empty()) << "A PermanentEntity must have a parent "
+                                    << "server tag.";
+  CHECK(parent_server_tag != kRootParentTag) << "Top-level entities should not "
+                                             << "be created with this factory.";
+
+  string id = FakeServerEntity::CreateId(model_type, server_tag);
+  string parent_id = FakeServerEntity::CreateId(model_type, parent_server_tag);
+  sync_pb::EntitySpecifics entity_specifics;
+  AddDefaultFieldValue(model_type, &entity_specifics);
+  return std::unique_ptr<FakeServerEntity>(new PermanentEntity(
+      id, model_type, name, parent_id, server_tag, entity_specifics));
+}
+
+// static
+std::unique_ptr<FakeServerEntity> PermanentEntity::CreateTopLevel(
+    const ModelType& model_type) {
+  CHECK(model_type != syncer::UNSPECIFIED) << "The entity's ModelType is "
+                                           << "invalid.";
+  string server_tag = syncer::ModelTypeToRootTag(model_type);
+  string name = syncer::ModelTypeToString(model_type);
+  string id = FakeServerEntity::GetTopLevelId(model_type);
+  sync_pb::EntitySpecifics entity_specifics;
+  AddDefaultFieldValue(model_type, &entity_specifics);
+  return std::unique_ptr<FakeServerEntity>(new PermanentEntity(
+      id, model_type, name, kRootParentTag, server_tag, entity_specifics));
+}
+
+// static
+std::unique_ptr<FakeServerEntity> PermanentEntity::CreateUpdatedNigoriEntity(
+    const sync_pb::SyncEntity& client_entity,
+    const FakeServerEntity& current_server_entity) {
+  ModelType model_type = current_server_entity.model_type();
+  CHECK(model_type == syncer::NIGORI) << "This factory only supports NIGORI "
+                                      << "entities.";
+
+  return base::WrapUnique<FakeServerEntity>(new PermanentEntity(
+      current_server_entity.id(), model_type, current_server_entity.GetName(),
+      current_server_entity.GetParentId(),
+      syncer::ModelTypeToRootTag(model_type), client_entity.specifics()));
+}
+
+PermanentEntity::PermanentEntity(const string& id,
+                                 const ModelType& model_type,
+                                 const string& name,
+                                 const string& parent_id,
+                                 const string& server_defined_unique_tag,
+                                 const sync_pb::EntitySpecifics& specifics)
+    : FakeServerEntity(id, string(), model_type, 0, name),
+      server_defined_unique_tag_(server_defined_unique_tag),
+      parent_id_(parent_id) {
+  SetSpecifics(specifics);
+}
+
+bool PermanentEntity::RequiresParentId() const {
+  return true;
+}
+
+string PermanentEntity::GetParentId() const {
+  return parent_id_;
+}
+
+void PermanentEntity::SerializeAsProto(sync_pb::SyncEntity* proto) const {
+  FakeServerEntity::SerializeBaseProtoFields(proto);
+  proto->set_server_defined_unique_tag(server_defined_unique_tag_);
+}
+
+bool PermanentEntity::IsFolder() const {
+  return true;
+}
+
+bool PermanentEntity::IsPermanent() const {
+  return true;
+}
+
+}  // namespace fake_server