[heap] Expand verification of layout changes to non-JSObject objects.

[heap] Expand verification of layout changes to non-JSObject objects.

On map change of an object this patch checks that
- either GC was notified about this change,
- or the change leaves the slot set of the object the same.

BUG=chromium:694255
Review-Url: https://codereview.chromium.org/2886223002
Cr-Commit-Position: refs/heads/master@{#45427}
Committed: https://chromium.googlesource.com/v8/v8/+/ee83890103a768829e8298132f97e78d46b681f7

[ulan, 2017-05-17 18:22:22]

ulan@chromium.org changed reviewers:
+ mlippautz@chromium.org

[ulan, 2017-05-17 18:22:22]

ptal

[Michael Lippautz, 2017-05-18 11:47:10]

lgtm

[ulan, 2017-05-19 13:09:23]

The CQ bit was checked by ulan@chromium.org

[commit-bot: I haz the power, 2017-05-19 13:09:27]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-05-19 13:46:09]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1495199363129510, "parent_rev":
"233b6926e3ae29a4567b4c55bc1c1e96c07c1f92", "commit_rev":
"ee83890103a768829e8298132f97e78d46b681f7"}

[commit-bot: I haz the power, 2017-05-19 13:46:15]

Description was changed from

==========
[heap] Expand verification of layout changes to non-JSObject objects.

On map change of an object this patch checks that
- either GC was notified about this change,
- or the change leaves the slot set of the object the same.

BUG=chromium:694255
==========

to

==========
[heap] Expand verification of layout changes to non-JSObject objects.

On map change of an object this patch checks that
- either GC was notified about this change,
- or the change leaves the slot set of the object the same.

BUG=chromium:694255

Review-Url: https://codereview.chromium.org/2886223002
Cr-Commit-Position: refs/heads/master@{#45427}
Committed:
https://chromium.googlesource.com/v8/v8/+/ee83890103a768829e8298132f97e78d46b...
==========

[commit-bot: I haz the power, 2017-05-19 13:46:17]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/ee83890103a768829e8298132f97e78d46b...