[Sync] Implements the loopback sync server.

components/sync/engine_impl/loopback_server/loopback_server_entity.cc

Index: components/sync/engine_impl/loopback_server/loopback_server_entity.cc
diff --git a/components/sync/test/fake_server/fake_server_entity.cc b/components/sync/engine_impl/loopback_server/loopback_server_entity.cc
similarity index 53%
copy from components/sync/test/fake_server/fake_server_entity.cc
copy to components/sync/engine_impl/loopback_server/loopback_server_entity.cc
index def68fccf4bf2513cd17632df83fe125310ead37..077aa81abdc044abded04d8190a81f2e911d7333 100644
--- a/components/sync/test/fake_server/fake_server_entity.cc
+++ b/components/sync/engine_impl/loopback_server/loopback_server_entity.cc
@@ -2,10 +2,13 @@
 // 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/fake_server_entity.h"
+#include "components/sync/engine_impl/loopback_server/loopback_server_entity.h"
+
+#include <stdint.h>
 
 #include <limits>
 #include <memory>
+#include <string>
 #include <vector>
 
 #include "base/guid.h"
@@ -15,73 +18,90 @@
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
+#include "components/sync/base/model_type.h"
+#include "components/sync/protocol/sync.pb.h"
 #include "net/base/net_errors.h"
 #include "net/http/http_status_code.h"
 
 using std::string;
 using std::vector;
+
 using syncer::ModelType;
 
+namespace {
 // The separator used when formatting IDs.
 //
 // We chose the underscore character because it doesn't conflict with the
 // special characters used by base/base64.h's encoding, which is also used in
 // the construction of some IDs.
 const char kIdSeparator[] = "_";
+}  // namespace
 
-namespace fake_server {
+namespace syncer {
 
-FakeServerEntity::~FakeServerEntity() {}
+LoopbackServerEntity::~LoopbackServerEntity() {}
 
-int64_t FakeServerEntity::GetVersion() const {
+const std::string& LoopbackServerEntity::GetId() const {
+  return id_;
+}
+
+ModelType LoopbackServerEntity::GetModelType() const {
+  return model_type_;
+}
+
+int64_t LoopbackServerEntity::GetVersion() const {
   return version_;
 }
 
-void FakeServerEntity::SetVersion(int64_t version) {
+void LoopbackServerEntity::SetVersion(int64_t version) {
   version_ = version;
 }
 
-const std::string& FakeServerEntity::GetName() const {
+const std::string& LoopbackServerEntity::GetName() const {
   return name_;
 }
 
-void FakeServerEntity::SetName(const std::string& name) {
+void LoopbackServerEntity::SetName(const std::string& name) {
   name_ = name;
 }
 
-void FakeServerEntity::SetSpecifics(
+void LoopbackServerEntity::SetSpecifics(
     const sync_pb::EntitySpecifics& updated_specifics) {
   specifics_ = updated_specifics;
 }
 
-bool FakeServerEntity::IsDeleted() const {
+sync_pb::EntitySpecifics LoopbackServerEntity::GetSpecifics() const {
+  return specifics_;
+}
+
+bool LoopbackServerEntity::IsDeleted() const {
   return false;
 }
 
-bool FakeServerEntity::IsFolder() const {
+bool LoopbackServerEntity::IsFolder() const {
   return false;
 }
 
-bool FakeServerEntity::IsPermanent() const {
+bool LoopbackServerEntity::IsPermanent() const {
   return false;
 }
 
 // static
-string FakeServerEntity::CreateId(const ModelType& model_type,
-                                  const string& inner_id) {
+string LoopbackServerEntity::CreateId(const ModelType& model_type,
+                                      const string& inner_id) {
   int field_number = GetSpecificsFieldNumberFromModelType(model_type);
   return base::StringPrintf("%d%s%s", field_number, kIdSeparator,
                             inner_id.c_str());
 }
 
 // static
-std::string FakeServerEntity::GetTopLevelId(const ModelType& model_type) {
-  return FakeServerEntity::CreateId(model_type,
-                                    syncer::ModelTypeToRootTag(model_type));
+std::string LoopbackServerEntity::GetTopLevelId(const ModelType& model_type) {
+  return LoopbackServerEntity::CreateId(model_type,
+                                        syncer::ModelTypeToRootTag(model_type));
 }
 
 // static
-ModelType FakeServerEntity::GetModelTypeFromId(const string& id) {
+ModelType LoopbackServerEntity::GetModelTypeFromId(const string& id) {
   vector<base::StringPiece> tokens = base::SplitStringPiece(
       id, kIdSeparator, base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
 
@@ -93,29 +113,19 @@ ModelType FakeServerEntity::GetModelTypeFromId(const string& id) {
   return syncer::GetModelTypeFromSpecificsFieldNumber(field_number);
 }
 
-FakeServerEntity::FakeServerEntity(const string& id,
-                                   const string& client_defined_unique_tag,
-                                   const ModelType& model_type,
-                                   int64_t version,
-                                   const string& name)
-    : id_(id),
-      client_defined_unique_tag_(client_defined_unique_tag),
-      model_type_(model_type),
-      version_(version),
-      name_(name) {
-  // There shouldn't be a unique_tag if the type is bookmarks.
-  DCHECK(model_type != syncer::BOOKMARKS || client_defined_unique_tag.empty());
-}
+LoopbackServerEntity::LoopbackServerEntity(const string& id,
+                                           const ModelType& model_type,
+                                           int64_t version,
+                                           const string& name)
+    : id_(id), model_type_(model_type), version_(version), name_(name) {}
 
-void FakeServerEntity::SerializeBaseProtoFields(
+void LoopbackServerEntity::SerializeBaseProtoFields(
     sync_pb::SyncEntity* sync_entity) const {
   sync_pb::EntitySpecifics* specifics = sync_entity->mutable_specifics();
   specifics->CopyFrom(specifics_);
 
-  // FakeServerEntity fields
+  // LoopbackServerEntity fields
   sync_entity->set_id_string(id_);
-  if (!client_defined_unique_tag_.empty())
-    sync_entity->set_client_defined_unique_tag(client_defined_unique_tag_);
   sync_entity->set_version(version_);
   sync_entity->set_name(name_);
 
@@ -127,4 +137,4 @@ void FakeServerEntity::SerializeBaseProtoFields(
     sync_entity->set_parent_id_string(GetParentId());
 }
 
-}  // namespace fake_server
+}  // namespace syncer