RFR: 8295475: Move non-resource allocation strategies out of ResourceObj [v3]

[Stefan Karlsson]

On Mon, 31 Oct 2022 06:06:59 GMT, David Holmes <dholmes at openjdk.org> wrote:

> In allocation.hpp we have this:
> 
> ```
> 416:  // Base class for classes that constitute name spaces.
> 417:
> 418:  class Arena;
> ```
> 
> The comment seems out of place as that belongs to `ALL_STATIC`.
> 
> Nowhere do we seem to define/describe what an Arena is in this header file.

Yes, you are right. Here's the change that added `class Arena;` between the comment and the AllStatic class:
https://github.com/openjdk/jdk/commit/d69af7b386da

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PR: https://git.openjdk.org/jdk/pull/10745