This reverts commit c594a20e.

Reason for revert: Speculative revert for link issues: https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux64%20UBSan/14658/overview

Original change's description:
> [cpu-profiler] Use base::LeakyObject for static CodeEntry objects
>
> This is preferred over the older LazyInstance based stuff, and has
> a lot less boilerplate and is easier to follow.
>
> Bug: v8:8600
> Change-Id: I7c5c5ae04c064b0fc598dc01f1ed5442dc21a17b
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2640475
> Commit-Queue: Peter Marshall <petermarshall@chromium.org>
> Reviewed-by: Clemens Backes <clemensb@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#72224}

TBR=petermarshall@chromium.org,clemensb@chromium.org

Change-Id: I2e4fce9bc58d289338814f3ee1b1520a97dfd3cf
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:8600
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2642251Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72225}