Prevent integer overflow in ComputedStyle::outlineOutsetExtent.

Prevent integer overflow in ComputedStyle::outlineOutsetExtent.

Uses SaturatedArithmetic::saturatedAddition to prevent overflow.

BUG=630524
Committed: https://crrev.com/063e851233a382696bf37ed989e322d3eced1efc
Cr-Commit-Position: refs/heads/master@{#410968}

[Bugs Nash, 2016-08-10 02:08:47]

bugsnash@chromium.org changed reviewers:
+ nainar@chromium.org

[nainar, 2016-08-10 03:24:22]

lgtm

[Bugs Nash, 2016-08-10 03:27:18]

bugsnash@chromium.org changed reviewers:
+ dstockwell@chromium.org

[dstockwell, 2016-08-10 03:52:15]

lgtm

[Bugs Nash, 2016-08-10 04:16:17]

The CQ bit was checked by bugsnash@chromium.org

[commit-bot: I haz the power, 2016-08-10 04:16:33]

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, 2016-08-10 05:41:23]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-08-10 05:44:57]

Description was changed from

==========
Prevent integer overflow in ComputedStyle::outlineOutsetExtent.

Uses SaturatedArithmetic::saturatedAddition to prevent overflow.

BUG=630524
==========

to

==========
Prevent integer overflow in ComputedStyle::outlineOutsetExtent.

Uses SaturatedArithmetic::saturatedAddition to prevent overflow.

BUG=630524

Committed: https://crrev.com/063e851233a382696bf37ed989e322d3eced1efc
Cr-Commit-Position: refs/heads/master@{#410968}
==========

[commit-bot: I haz the power, 2016-08-10 05:44:58]

Patchset 2 (id:??) landed as
https://crrev.com/063e851233a382696bf37ed989e322d3eced1efc
Cr-Commit-Position: refs/heads/master@{#410968}