RFR: 8079082: VerifyNoCSetOopsClosure is derived twice from Closure

[Eric Caspole]

Hi Kim,
Looks good.
Eric


On 07/24/2015 04:41 PM, Kim Barrett wrote:
> Please review this cleanup to eliminate improper and unnecessary
> multiple inheritance by a verification closure.
>
> - Changed the closure to an ordinary function object, with some
> simplifications, elimination of virtual functions, and renaming as a
> result.
>
> - Eliminated VerifyNoCSetOopsPhase enum, instead just making the calls
> to setup the checking function pass in the appropriate string.  The
> only thing the enum values were used for was to determine the desired
> string.
>
> - Replaced CMMarkStack::oops_do with iterate function template.
>
> - Replaced GenericTaskQueue::oops_do with iterate function template.
> This class really has no business having a hard-wired iterator over
> oop elements.
>
> - While I was in the neighborhood, eliminated an unnecessary nearby
> cast.
>
> CR:
> https://bugs.openjdk.java.net/browse/JDK-8079082
>
> Webrev:
> http://cr.openjdk.java.net/~kbarrett/8079082/webrev.00/
>
> Testing:
> jprt, local jtreg
>