S390: [regexp] do not assume short external strings have a minimum size.

S390: [regexp] do not assume short external strings have a minimum size.

Port 3518e492c0939759ae1a2623bbd606646ee172f1

Original commit message:

    Short external strings do not cache the resource data, and may be used
    for compressible strings. The assumptions about their lengths is
    invalid and may lead to oob reads.

R=yangguo@chromium.org, joransiu@ca.ibm.com, bjaideep@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=v8:4923, chromium:604897
LOG=N

Committed: https://crrev.com/14c9cbd4cfaa235801e0372178e8af039cb2233f
Cr-Commit-Position: refs/heads/master@{#35682}

[john.yan, 2016-04-20 21:56:03]

PTAL

[john.yan, 2016-04-20 21:56:12]

The CQ bit was checked by jyan@ca.ibm.com to run a CQ dry run

[commit-bot: I haz the power, 2016-04-20 21:56:22]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1911633002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1911633002/1

[commit-bot: I haz the power, 2016-04-20 22:13:34]

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

[commit-bot: I haz the power, 2016-04-20 22:13:35]

Dry run: This issue passed the CQ dry run.

[JoranSiu, 2016-04-21 00:46:22]

lgtm

[john.yan, 2016-04-21 04:00:33]

The CQ bit was checked by jyan@ca.ibm.com

[commit-bot: I haz the power, 2016-04-21 04:00:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1911633002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1911633002/1

[commit-bot: I haz the power, 2016-04-21 05:02:47]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-22 19:13:59]

Description was changed from

==========
S390: [regexp] do not assume short external strings have a minimum size.

Port 3518e492c0939759ae1a2623bbd606646ee172f1

Original commit message:

    Short external strings do not cache the resource data, and may be used
    for compressible strings. The assumptions about their lengths is
    invalid and may lead to oob reads.

R=yangguo@chromium.org, joransiu@ca.ibm.com, bjaideep@ca.ibm.com,
michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=v8:4923,chromium:604897
LOG=N
==========

to

==========
S390: [regexp] do not assume short external strings have a minimum size.

Port 3518e492c0939759ae1a2623bbd606646ee172f1

Original commit message:

    Short external strings do not cache the resource data, and may be used
    for compressible strings. The assumptions about their lengths is
    invalid and may lead to oob reads.

R=yangguo@chromium.org, joransiu@ca.ibm.com, bjaideep@ca.ibm.com,
michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=v8:4923,chromium:604897
LOG=N

Committed: https://crrev.com/14c9cbd4cfaa235801e0372178e8af039cb2233f
Cr-Commit-Position: refs/heads/master@{#35682}
==========

[commit-bot: I haz the power, 2016-04-22 19:14:00]

Patchset 1 (id:??) landed as
https://crrev.com/14c9cbd4cfaa235801e0372178e8af039cb2233f
Cr-Commit-Position: refs/heads/master@{#35682}