This reverts commit a4db68d4.

Reason for revert: Speculatively reverting: failure on win32 bot
https://ci.chromium.org/p/v8/builders/ci/V8%20Win32%20-%20debug/23495
Not sure if the test is flaky or this cl is actually making it flaky. Reverting while I investigate this issue.

Original change's description:
> Reland "[TurboFan] Don't serialize read-only heap objects"
> 
> Reland the cl with fixes to TSAN failures.
> 
> This reverts commit 03c9de73.
> 
> 
> Original change's description:
> > Revert "[TurboFan] Don't serialize read-only heap objects"
> >
> > This reverts commit 9f18e55f.
> >
> > Reason for revert: https://ci.chromium.org/p/v8/builders/ci/V8%20Linux64%20TSAN/29660
> >
> > Original change's description:
> > > [TurboFan] Don't serialize read-only heap objects
> > >
> > > Read-only heap objects are immutable and immovable. It is safe to access
> > > these objects directly from the heap. Not having to serialize them
> > > reduces the time we spend on main thread especially for TurboProp.
> > >
> > > Bug: v8:9684
> > > Change-Id: Ibabb7076af50c9007d2a8ed57fe257406958fb6a
> > > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1955596
> > > Reviewed-by: Michael Stanton <mvstanton@chromium.org>
> > > Reviewed-by: Maya Lekova <mslekova@chromium.org>
> > > Commit-Queue: Mythri Alle <mythria@chromium.org>
> > > Cr-Commit-Position: refs/heads/master@{#65490}
> >
> > TBR=mvstanton@chromium.org,neis@chromium.org,mythria@chromium.org,mslekova@chromium.org
> >
> > Change-Id: If2d8649cdc083f7d064684352501320a96a1ba2c
> > No-Presubmit: true
> > No-Tree-Checks: true
> > No-Try: true
> > Bug: v8:9684
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1973732
> > Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
> > Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#65492}
> 
> TBR=mvstanton@chromium.org,neis@chromium.org,mythria@chromium.org,mslekova@chromium.org,nicohartmann@chromium.org
> 
> # Not skipping CQ checks because original CL landed > 1 day ago.
> 
> Bug: v8:9684
> Change-Id: I54c9973d0f4d88504b2fb920feb3480fe1f1e1fc
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1980573
> Reviewed-by: Mythri Alle <mythria@chromium.org>
> Reviewed-by: Michael Stanton <mvstanton@chromium.org>
> Commit-Queue: Mythri Alle <mythria@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#65584}

TBR=mvstanton@chromium.org,neis@chromium.org,mythria@chromium.org,mslekova@chromium.org,nicohartmann@chromium.org

Change-Id: Ic28774a2530bb7b6688a974f2af4a23ec04ef236
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9684
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1987250Reviewed-by: Mythri Alle <mythria@chromium.org>
Commit-Queue: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65585}