It is required for the LSP: TypeFox/monaco-languageclient#39.

It looks like the conversion should be done here:
https://github.com/Microsoft/vscode/blob/63efefc7c279e7c963d223123d7248137034252a/src/vs/editor/standalone/browser/standaloneLanguages.ts#L626

@alexandrudima is there a reason not doing it?