RFR: 8167289 : Backport ES6 updates from Graal.js

[Marcus Lagergren]

+1

/M

> On 6 Oct 2016, at 16:51, Hannes Wallnöfer <hannes.wallnoefer at oracle.com> wrote:
> 
> Please review:
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8167289
> Webrev: http://cr.openjdk.java.net/~hannesw/8167289/webrev.00/
> 
> These is mostly refactoring Andreas did in the Graal.js parser. It also contains minor ES6 parsing fixes. Tests for these will be included together with other additional ES6 tests I’m working on, but I wanted to do a separate commit for the backport, so this issue is labeled noreg-cleanup.
> 
> Thanks,
> Hannes