RFR 8133777: Use file based persistence for history instead of preferences

[Michael Haupt]

Hi Sundar,

lower-case thumbs up.

Nit: In the "clear" case in HistoryObject.getMember(), I think hist::clear would work instead of the lambda.

Best,

Michael

> Am 17.08.2015 um 17:54 schrieb Sundararajan Athijegannathan <sundararajan.athijegannathan at oracle.com>:
> 
> Hi,
> 
> Please review http://cr.openjdk.java.net/~sundar/8133777/ for https://bugs.openjdk.java.net/browse/JDK-8133777
> 
> Thanks,
> -Sundar