Review request for JDK-8151811: Const declarations do not work in for..in loops

[Hannes Wallnoefer]

Please review JDK-8151811: Const declarations do not work in for..in loops:
http://cr.openjdk.java.net/~hannesw/8151811/webrev/

This is pretty trivial because most of it is fixed in JDK-8151810 
(previous review request) already.

Hannes