100644 blob 590fb085a02ed466bcaf0138ae802f03a109f6a6	undo_manager.cc
100644 blob 739d151350d1744111a095e40f5f6f31cc7016ba	undo_manager.h
100644 blob f4cad092dfe90d31e99f961d9ecfec46f9375254	undo_manager_test.cc
100644 blob 48c1d0e0b4f774907fc7609dd8b7c5527e23036b	undo_manager_utils.cc
100644 blob b99817a1caaab4c697e8e6466f2b59530d0c1b15	undo_manager_utils.h
100644 blob 5802970964ba7b61f0d66a7c2c5c207c5fb0a350	undo_operation.h