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

components/sync/test/fake_server/fake_server_entity.h

Index: components/sync/test/fake_server/fake_server_entity.h
diff --git a/components/sync/test/fake_server/fake_server_entity.h b/components/sync/test/fake_server/fake_server_entity.h
new file mode 100644
index 0000000000000000000000000000000000000000..1e0257979822b6ce063df56fa2303f8c5a993488
--- /dev/null
+++ b/components/sync/test/fake_server/fake_server_entity.h
@@ -0,0 +1,91 @@
+// 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 COMPONENTS_SYNC_TEST_FAKE_SERVER_FAKE_SERVER_ENTITY_H_
+#define COMPONENTS_SYNC_TEST_FAKE_SERVER_FAKE_SERVER_ENTITY_H_
+
+#include <stdint.h>
+
+#include <map>
+#include <string>
+
+#include "components/sync/base/model_type.h"
+#include "components/sync/protocol/sync.pb.h"
+
+namespace fake_server {
+
+// The representation of a Sync entity for the fake server.
+class FakeServerEntity {
+ public:
+  // Creates an ID of the form <type><separator><inner-id> where
+  // <type> is the EntitySpecifics field number for |model_type|, <separator>
+  // is kIdSeparator, and <inner-id> is |inner_id|.
+  //
+  // If |inner_id| is globally unique, then the returned ID will also be
+  // globally unique.
+  static std::string CreateId(const syncer::ModelType& model_type,
+                              const std::string& inner_id);
+
+  // Returns the ID string of the top level node for the specified type.
+  static std::string GetTopLevelId(const syncer::ModelType& model_type);
+
+  virtual ~FakeServerEntity();
+  const std::string& id() const { return id_; }
+  const std::string& client_defined_unique_tag() const {
+    return client_defined_unique_tag_;
+  }
+  syncer::ModelType model_type() const { return model_type_; }
+  int64_t GetVersion() const;
+  void SetVersion(int64_t version);
+  const std::string& GetName() const;
+  void SetName(const std::string& name);
+
+  // Replaces |specifics_| with |updated_specifics|. This method is meant to be
+  // used to mimic a client commit.
+  void SetSpecifics(const sync_pb::EntitySpecifics& updated_specifics);
+
+  // Common data items needed by server
+  virtual bool RequiresParentId() const = 0;
+  virtual std::string GetParentId() const = 0;
+  virtual void SerializeAsProto(sync_pb::SyncEntity* proto) const = 0;
+  virtual bool IsDeleted() const;
+  virtual bool IsFolder() const;
+  virtual bool IsPermanent() const;
+
+ protected:
+  // Extracts the ModelType from |id|. If |id| is malformed or does not contain
+  // a valid ModelType, UNSPECIFIED is returned.
+  static syncer::ModelType GetModelTypeFromId(const std::string& id);
+
+  FakeServerEntity(const std::string& id,
+                   const std::string& client_defined_unique_tag,
+                   const syncer::ModelType& model_type,
+                   int64_t version,
+                   const std::string& name);
+
+  void SerializeBaseProtoFields(sync_pb::SyncEntity* sync_entity) const;
+
+ private:
+  // The entity's ID.
+  const std::string id_;
+
+  // The tag for this entity. Can be empty for bookmarks or permanent entities.
+  const std::string client_defined_unique_tag_;
+
+  // The ModelType that categorizes this entity.
+  const syncer::ModelType model_type_;
+
+  // The version of this entity.
+  int64_t version_;
+
+  // The name of the entity.
+  std::string name_;
+
+  // The EntitySpecifics for the entity.
+  sync_pb::EntitySpecifics specifics_;
+};
+
+}  // namespace fake_server
+
+#endif  // COMPONENTS_SYNC_TEST_FAKE_SERVER_FAKE_SERVER_ENTITY_H_