This reverts commit cf25b3bc53.
Reason for revert: https://crbug.com/1307471. TraceTrait must only be used during marking.
Original change's description:
> cppgc: Rework prefinalizers
>
> Move the check for whether an object is live or dead out of the
> prefinalizer trampoline. Moving it into the backend allows for
> inlining the check which avoids a call to the trampoline for live
> objects.
>
> On catapult benchmarks (e.g. cnn:2021, nytimes:2020), there's often
> ~2k finalizers registered. In order to avoid memory overhead in the
> range of a few KB, we store the fact whether the object points to the
> base object payload in the LSB of the pointer. For caged builds this
> is replaced with just storing the index into the cage for both object
> and base object payload.
>
> Locally saves around ~10% of atomic sweeping processing time which is
> in the order of .05ms.
>
> Bug: v8:12698
> Change-Id: I198205a6b1d57fc2df821ee4e73e53dc6f825ff5
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3497764
> Reviewed-by: Omer Katz <omerkatz@chromium.org>
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#79442}
Bug: v8:12698, chromium:1307471
Change-Id: I5c4e70d46cb99af66c77f0c013625b6af6c6eb8e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3535781
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79527}
f46c4858b0