[regexp] Fix numbered reference before named capture

[regexp] Fix numbered reference before named capture

Numbered back-references that occur before the referenced capture
trigger an internal mini-parser that looks ahead in the pattern and
counts capturing groups.

This updates the mini-parser to correctly handle named captures.

BUG=v8:5437
Review-Url: https://codereview.chromium.org/2792523002
Cr-Commit-Position: refs/heads/master@{#44303}
Committed: https://chromium.googlesource.com/v8/v8/+/3f8b2aeb3587dad6a279d439db56db785197253a

[jgruber, 2017-03-31 09:00:28]

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

[commit-bot: I haz the power, 2017-03-31 09:00:37]

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

[jgruber, 2017-03-31 09:03:13]

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

[commit-bot: I haz the power, 2017-03-31 09:44:20]

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

[commit-bot: I haz the power, 2017-03-31 09:44:20]

Dry run: This issue passed the CQ dry run.

[Yang, 2017-03-31 10:43:33]

On 2017/03/31 09:03:13, jgruber wrote:

lgtm.

[jgruber, 2017-03-31 10:48:20]

The CQ bit was checked by jgruber@chromium.org

[commit-bot: I haz the power, 2017-03-31 10:48:31]

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, 2017-03-31 10:50:05]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1490957300802580, "parent_rev":
"d6bd3ebaea728d4c6694f22fc5334d1e1b2c1589", "commit_rev":
"3f8b2aeb3587dad6a279d439db56db785197253a"}

[commit-bot: I haz the power, 2017-03-31 10:50:10]

Description was changed from

==========
[regexp] Fix numbered reference before named capture

Numbered back-references that occur before the referenced capture
trigger an internal mini-parser that looks ahead in the pattern and
counts capturing groups.

This updates the mini-parser to correctly handle named captures.

BUG=v8:5437
==========

to

==========
[regexp] Fix numbered reference before named capture

Numbered back-references that occur before the referenced capture
trigger an internal mini-parser that looks ahead in the pattern and
counts capturing groups.

This updates the mini-parser to correctly handle named captures.

BUG=v8:5437

Review-Url: https://codereview.chromium.org/2792523002
Cr-Commit-Position: refs/heads/master@{#44303}
Committed:
https://chromium.googlesource.com/v8/v8/+/3f8b2aeb3587dad6a279d439db56db78519...
==========

[commit-bot: I haz the power, 2017-03-31 10:50:11]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/3f8b2aeb3587dad6a279d439db56db78519...