RFR: 8248133: SerialGC: Unify handling of all OopStorage instances in root processing

[Kim Barrett]

> On Jun 23, 2020, at 6:06 AM, Stefan Karlsson <stefan.karlsson at oracle.com> wrote:
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> On 2020-06-23 11:53, Kim Barrett wrote:
>> This change presumes we like JDK-8234502 :)
> 
> Yeah, we do. ;) It would be nice to see some start chipping away at that. I'm not sure it has to be an all-in-one change.

Oh please, NOT an all-in-one change!