[regexp] catch stack overflow when parsing back references.

[regexp] catch stack overflow when parsing back references.

R=jkummerow@chromium.org
BUG=chromium:595657
LOG=N

Committed: https://crrev.com/1e2d0e113627dd9d123334ed8a62ef81697c9fe7
Cr-Commit-Position: refs/heads/master@{#34894}

[Jakob Kummerow, 2016-03-18 14:27:54]

lgtm

[Yang, 2016-03-18 14:28:34]

The CQ bit was checked by yangguo@chromium.org

[commit-bot: I haz the power, 2016-03-18 14:28:38]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1811913006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1811913006/1

[commit-bot: I haz the power, 2016-03-18 14:52:33]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-18 14:52:46]

Description was changed from

==========
[regexp] catch stack overflow when parsing back references.

R=jkummerow@chromium.org
BUG=chromium:595657
LOG=N
==========

to

==========
[regexp] catch stack overflow when parsing back references.

R=jkummerow@chromium.org
BUG=chromium:595657
LOG=N

Committed: https://crrev.com/1e2d0e113627dd9d123334ed8a62ef81697c9fe7
Cr-Commit-Position: refs/heads/master@{#34894}
==========

[commit-bot: I haz the power, 2016-03-18 14:52:47]

Patchset 1 (id:??) landed as
https://crrev.com/1e2d0e113627dd9d123334ed8a62ef81697c9fe7
Cr-Commit-Position: refs/heads/master@{#34894}