Robustify NewNumberFromSize against int-overflow on cast

Robustify NewNumberFromSize against int-overflow on cast

As luck would have it, there doesn't seem to be a way to trigger
observable misbehavior currently (only with special flags).

BUG=chromium:380671
LOG=n
R=mvstanton@chromium.org

Committed: https://crrev.com/b40a22dc87002419cb0fcab9acb2f018e311c5c8
Cr-Commit-Position: refs/heads/master@{#33305}

[mvstanton, 2016-01-14 11:50:13]

lgtm

[mvstanton, 2016-01-14 11:50:17]

The CQ bit was checked by mvstanton@chromium.org

[commit-bot: I haz the power, 2016-01-14 11:50:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1588013002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1588013002/1

[commit-bot: I haz the power, 2016-01-14 12:15:32]

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

[commit-bot: I haz the power, 2016-01-14 12:15:32]

Try jobs failed on following builders:
  v8_linux_arm_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux_arm_rel/builds/12378)

[Jakob Kummerow, 2016-01-14 17:04:32]

The CQ bit was checked by jkummerow@chromium.org

[commit-bot: I haz the power, 2016-01-14 17:04:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1588013002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1588013002/1

[commit-bot: I haz the power, 2016-01-14 17:23:25]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-01-14 17:24:11]

Description was changed from

==========
Robustify NewNumberFromSize against int-overflow on cast

As luck would have it, there doesn't seem to be a way to trigger
observable misbehavior currently (only with special flags).

BUG=chromium:380671
LOG=n
R=mvstanton@chromium.org
==========

to

==========
Robustify NewNumberFromSize against int-overflow on cast

As luck would have it, there doesn't seem to be a way to trigger
observable misbehavior currently (only with special flags).

BUG=chromium:380671
LOG=n
R=mvstanton@chromium.org

Committed: https://crrev.com/b40a22dc87002419cb0fcab9acb2f018e311c5c8
Cr-Commit-Position: refs/heads/master@{#33305}
==========

[commit-bot: I haz the power, 2016-01-14 17:24:11]

Patchset 1 (id:??) landed as
https://crrev.com/b40a22dc87002419cb0fcab9acb2f018e311c5c8
Cr-Commit-Position: refs/heads/master@{#33305}