[regexp] Cache the correct initial prototype map

[regexp] Cache the correct initial prototype map

If the prototype's map is not marked as fast, it is made fast after
setup, breaking current RegExp fast path checks.

BUG=v8:5339
Committed: https://crrev.com/1e3c5c90cdb1d2b2e5a950d72cb509cfc341e374
Cr-Commit-Position: refs/heads/master@{#41336}

[jgruber, 2016-11-28 16:09:27]

The CQ bit was checked by jgruber@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-11-28 16:09:38]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[jgruber, 2016-11-28 16:10:09]

jgruber@chromium.org changed reviewers:
+ verwaest@chromium.org

[commit-bot: I haz the power, 2016-11-28 16:34:29]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-11-28 16:34:30]

Dry run: This issue passed the CQ dry run.

[jgruber, 2016-11-29 07:16:04]

jgruber@chromium.org changed reviewers:
+ ishell@chromium.org

[jgruber, 2016-11-29 07:16:05]

+ishell

[Igor Sheludko, 2016-11-29 07:37:38]

lgtm

[jgruber, 2016-11-29 07:39:27]

The CQ bit was checked by jgruber@chromium.org

[commit-bot: I haz the power, 2016-11-29 07:39:33]

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, 2016-11-29 07:41:08]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1480405167571600, "parent_rev":
"83891c924efd1992d4fec9290b58225b60bf8487", "commit_rev":
"15a3a15f4e0941e2dfd0dafa8e311f6747d9af6e"}

[commit-bot: I haz the power, 2016-11-29 07:41:15]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-29 07:41:53]

Description was changed from

==========
[regexp] Cache the correct initial prototype map

If the prototype's map is not marked as fast, it is made fast after
setup, breaking current RegExp fast path checks.

BUG=v8:5339
==========

to

==========
[regexp] Cache the correct initial prototype map

If the prototype's map is not marked as fast, it is made fast after
setup, breaking current RegExp fast path checks.

BUG=v8:5339

Committed: https://crrev.com/1e3c5c90cdb1d2b2e5a950d72cb509cfc341e374
Cr-Commit-Position: refs/heads/master@{#41336}
==========

[commit-bot: I haz the power, 2016-11-29 07:41:54]

Patchset 1 (id:??) landed as
https://crrev.com/1e3c5c90cdb1d2b2e5a950d72cb509cfc341e374
Cr-Commit-Position: refs/heads/master@{#41336}