[regexp] Fix passing all flags to RegExp construction

[regexp] Fix passing all flags to RegExp construction

Do not bail out when passed a flags string with length > 5, use a
meaningful named constant instead.

Found by https://github.com/tc39/test262/pull/997#issuecomment-296963675

BUG=v8:6300
Review-Url: https://codereview.chromium.org/2841633004
Cr-Commit-Position: refs/heads/master@{#44834}
Committed: https://chromium.googlesource.com/v8/v8/+/a1af3315a2804fe21c575f45872350b958878e24

[jgruber, 2017-04-25 09:07:50]

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

[commit-bot: I haz the power, 2017-04-25 09:07:52]

Dry run: CQ is trying da patch.

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

[jgruber, 2017-04-25 09:19:56]

jgruber@chromium.org changed reviewers:
+ mathias@qiwi.be, yangguo@chromium.org

[Yang, 2017-04-25 09:21:14]

On 2017/04/25 09:19:56, jgruber wrote:

lgtm.

[jgruber, 2017-04-25 09:31:47]

The CQ bit was unchecked by jgruber@chromium.org

[jgruber, 2017-04-25 09:31:52]

The CQ bit was checked by jgruber@chromium.org

[commit-bot: I haz the power, 2017-04-25 09:32:04]

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, 2017-04-25 09:35:23]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493112712278030, "parent_rev":
"904e5df567844939a065f558ea338cbdc05eb2cd", "commit_rev":
"a1af3315a2804fe21c575f45872350b958878e24"}

[commit-bot: I haz the power, 2017-04-25 09:35:28]

Description was changed from

==========
[regexp] Fix passing all flags to RegExp construction

Do not bail out when passed a flags string with length > 5, use a
meaningful named constant instead.

Found by https://github.com/tc39/test262/pull/997#issuecomment-296963675

BUG=v8:6300
==========

to

==========
[regexp] Fix passing all flags to RegExp construction

Do not bail out when passed a flags string with length > 5, use a
meaningful named constant instead.

Found by https://github.com/tc39/test262/pull/997#issuecomment-296963675

BUG=v8:6300

Review-Url: https://codereview.chromium.org/2841633004
Cr-Commit-Position: refs/heads/master@{#44834}
Committed:
https://chromium.googlesource.com/v8/v8/+/a1af3315a2804fe21c575f45872350b9588...
==========

[commit-bot: I haz the power, 2017-04-25 09:35:29]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/a1af3315a2804fe21c575f45872350b9588...