Invalid ObjectLiteral shorthand by non-identifier

ref. https://github.com/google/closure-compiler/pull/585

Fixed in Parse.java

https://github.com/google/closure-compiler/pull/585#issuecomment-52665277
> (and have you signed the CLA?) :)

Not yet. What am I supposed to do?

https://github.com/google/closure-compiler/blob/master/CONTRIBUTORS
nit: indent by two spaces instead of four