[tree] Normalize includes and fwd decls (NFC).
[tree] Normalize includes and fwd decls (NFC).

root-mirror/root,olifre/root,karies/root,root-mirror/root,olifre/root,karies/root,olifre/root,root-mirror/root,olifre/root,karies/root,karies/root,root-mirror/root,karies/root,karies/root,karies/root,olifre/root,root-mirror/root,olifre/root,olifre/root,root-mirror/root,root-mirror/root,root-mirror/root,karies/root,olifre/root,root-mirror/root,karies/root,olifre/root,olifre/root,karies/root,root-mirror/root,olifre/root,karies/root,root-mirror/root