chromium/components/undo/undo_operation.h

// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_UNDO_UNDO_OPERATION_H_
#define COMPONENTS_UNDO_UNDO_OPERATION_H_

// Base class for all undo operations.
class UndoOperation { … };

#endif  // COMPONENTS_UNDO_UNDO_OPERATION_H_