RFR: 8140509: Add note_gc_start to G1CollectorPolicy

[Thomas Schatzl]

Hi,

On Tue, 2015-10-27 at 16:34 +0100, Erik Helin wrote:
> Hi all,
> 
> this tiny patch adds a new utility method to G1CollectorPolicy,
> note_gc_start. This patch further hide the G1GCPhaseTimes a bit more
> from G1CollectorPolicy.
> 
> Enhancement:
> https://bugs.openjdk.java.net/browse/JDK-8140509
> 
> Webrev:
> http://cr.openjdk.java.net/~ehelin/8140509/webrev.00/
> 

  looks good.

Thomas