RFR: 8231616: Simplify compilation policy hierarchy

[Nils Eliasson]

Excellent!

Reviewed.

// Nils

On 2019-09-30 11:59, Claes Redestad wrote:
> Hi,
>
> after JDK-8231471 there's no need for NonTieredCompPolicy, so I suggest
> folding this abstract base class into SimpleCompPolicy. There are also
> a few private/protected methods that were virtual before that no longer
> needs to be.
>
> Bug:    https://bugs.openjdk.java.net/browse/JDK-8231616
> Webrev: http://cr.openjdk.java.net/~redestad/8231616/open.00/
>
> Testing: tier1-3
>
> Thanks!
>
> /Claes