This reverts commit a2512819f8.
Reason for revert: FFI tests fail to link on Windows, fail to load on product-mode Android
Original change's description:
> [vm] Expose Dart_{CurrentIsolate,ExitIsolate,EnterIsolate}
>
> For applications that want to have arbitrary number of isolates call
> into native code that may be blocking, we expose the API functions that
> allows those native threads to exit an isolate before running
> long/blocking code.
>
> Without the ability to exit/re-enter isolate, one may experience
> deadlocks as we have a fixed limit on the number of concurrently
> executing isolates atm.
>
> In the longer term we may find a way to do this automatically
> with low overhead, see [0]. But since those API functions are quite
> stable and we already expose e.g. `Dart_{Enter,Exit}Scope`, I don't
> see a reason not to expose `Dart_{Enter,Exit}Isolate`.
>
> [0] Issue https://github.com/dart-lang/sdk/issues/51261
>
> Issue https://github.com/dart-lang/sdk/issues/51254
>
> TEST=ffi{,_2}/dl_api_exit_enter_isolate_test
>
> Change-Id: I91c772ca962fddb87919663fea07939a498fa205
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/292722
> Commit-Queue: Martin Kustermann <kustermann@google.com>
> Reviewed-by: Daco Harkes <dacoharkes@google.com>
> Reviewed-by: Ryan Macnak <rmacnak@google.com>
Change-Id: I05ad5b9ce24754a68693160e470f8eb71a812c75
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/294860
Auto-Submit: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Ryan Macnak
783d0ef90a