RFR: 8167289 : Backport ES6 updates from Graal.js

[Hannes Wallnöfer]

This change conflicts with Attila’s add-finals change in Parser.java. I uploaded a new webrev with the merged patch. I double-checked that it keeps the finals and that the code I added uses final too.

http://cr.openjdk.java.net/~hannesw/8167289/webrev.01/

Hannes


> Am 07.10.2016 um 05:27 schrieb Sundararajan Athijegannathan <sundararajan.athijegannathan at oracle.com>:
> 
> +1
> 
> -Sundar
> 
> 
> On 10/6/2016 8:21 PM, Hannes Wallnöfer 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
>