Add deletes_from_union to Engine
Add deletes_from_union to Engine

fuchsia-mirror/third_party-xi-editor,google/xi-editor,fuchsia-mirror/third_party-xi-editor,google/xi-editor,fuchsia-mirror/third_party-xi-editor,modelorganism/xi-editor,fuchsia-mirror/third_party-xi-editor,modelorganism/xi-editor,modelorganism/xi-editor,google/xi-editor,google/xi-editor