Bug 1945304 [wpt PR 50425] - Reland "Ensure AbortSignal.throwIfAborted doesn't modify the message of an abort error", a=testonly

Automatic update from web-platform-tests
Reland "Ensure AbortSignal.throwIfAborted doesn't modify the message of an abort error"

This reverts commit 74320221ad24d0050a8baa031ca1d0e998ea7fc6.

Reason for revert: Not the cause of issues.chromium.org/issues/393009392

Original change's description:
> Revert "Ensure AbortSignal.throwIfAborted doesn't modify the message of an abort error"
>
> This reverts commit 0e0ef178e05e3f81b0de04c8f0197fe3ab608f41.
>
> Reason for revert: Possible culprit for windows builder closure, see https://g-issues.chromium.org/issues/393009392.
>
> Original change's description:
> > Ensure AbortSignal.throwIfAborted doesn't modify the message of an abort error
> >
> > Fixed: 392413688
> > Change-Id: I3639c573cd7349eac1f9b09c427a5a52bccdda72
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6209470
> > Reviewed-by: Andrey Kosyakov <[email protected]>
> > Commit-Queue: Nate Chapin <[email protected]>
> > Cr-Commit-Position: refs/heads/main@{#1412605}
>
> Change-Id: Ifb785338a85e77e845a677940fc1353b74757b0f
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6211537
> Commit-Queue: Patti Lor <[email protected]>
> Owners-Override: Patti Lor <[email protected]>
> Bot-Commit: Rubber Stamper <[email protected]>
> Reviewed-by: Patti Lor <[email protected]>
> Auto-Submit: Patti Lor <[email protected]>
> Cr-Commit-Position: refs/heads/main@{#1412694}

Change-Id: Ic42d7631d3ebe6a1c902e0763fdc3335f5262b33
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6221802
Commit-Queue: Andrey Kosyakov <[email protected]>
Bot-Commit: Rubber Stamper <[email protected]>
Reviewed-by: Andrey Kosyakov <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1414549}

--

wpt-commits: dc928169ee38969433af668319a73ed9196ffbee
wpt-pr: 50425

Author: natechapin

testing/web-platform/tests/dom/abort/event.any.js

@@ -172,9 +172,12 @@ test(t => {
 
 test(t => {
   const reason = new Error('boom');
+  const message = reason.message;
   const signal = AbortSignal.abort(reason);
   assert_true(signal.aborted);
   assert_throws_exactly(reason, () => signal.throwIfAborted());
+  assert_equals(reason.message, message,
+                "abort.reason should not be changed by throwIfAborted()");
 }, "throwIfAborted() should throw abort.reason if signal aborted");
 
 test(t => {