Expose string/regexp related public symbols on harmony flag.

Expose string/regexp related public symbols on harmony flag.

R=littledan@chromium.org
BUG=v8:4305, v8:4343, v8:4344, v8:4345
LOG=N

Committed: https://crrev.com/f8a43459d4ee65ec2c9afc4aa8bc9746f9cc6c0b
Cr-Commit-Position: refs/heads/master@{#31702}

[Yang, 2015-10-29 12:52:21]

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

[commit-bot: I haz the power, 2015-10-29 12:52:29]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1408223004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1408223004/1

[commit-bot: I haz the power, 2015-10-29 13:52:51]

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

[commit-bot: I haz the power, 2015-10-29 13:52:52]

Dry run: This issue passed the CQ dry run.

[Yang, 2015-10-30 05:54:56]

On 2015/10/29 13:52:52, commit-bot: I haz the power wrote:
> Dry run: This issue passed the CQ dry run.

ping

[Yang, 2015-11-02 05:34:01]

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

[Yang, 2015-11-02 05:34:01]

Michael, could you take a look at this CL? Thanks!

[Yang, 2015-11-02 05:38:26]

yangguo@chromium.org changed reviewers:
+ ishell@chromium.org
- mvstanton@chromium.org

[Yang, 2015-11-02 05:38:27]

Nevermind Michael...

Igor, could you take a look? Thanks.

[Igor Sheludko, 2015-11-02 07:44:26]

lgtm

[Yang, 2015-11-02 07:52:30]

The CQ bit was checked by yangguo@chromium.org

[commit-bot: I haz the power, 2015-11-02 07:52:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1408223004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1408223004/1

[commit-bot: I haz the power, 2015-11-02 08:42:49]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-02 08:43:10]

Patchset 1 (id:??) landed as
https://crrev.com/f8a43459d4ee65ec2c9afc4aa8bc9746f9cc6c0b
Cr-Commit-Position: refs/heads/master@{#31702}