Correctly check for overflow in FX_atonum.

Correctly check for overflow in FX_atonum.

Instead of the existing method, use the CheckedNumeric class to check for
overflow during conversion.

BUG=chromium:596526
Committed: https://pdfium.googlesource.com/pdfium/+/bc8a64029f898286c3dcad3a6cecdc98ef30b139

[dsinclair, 2016-05-19 18:22:49]

dsinclair@chromium.org changed reviewers:
+ thestig@chromium.org, tsepez@chromium.org

[dsinclair, 2016-05-19 18:22:49]

PTAL.

[Tom Sepez, 2016-05-19 18:34:14]

lgtm

[dsinclair, 2016-05-19 18:35:14]

The CQ bit was checked by dsinclair@chromium.org

[commit-bot: I haz the power, 2016-05-19 18:35:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1992023003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1992023003/1

[commit-bot: I haz the power, 2016-05-19 18:37:16]

Description was changed from

==========
Correctly check for overflow in FX_atonum.

Instead of the existing method, use the CheckedNumeric class to check for
overflow during conversion.

BUG=chromium:596526
==========

to

==========
Correctly check for overflow in FX_atonum.

Instead of the existing method, use the CheckedNumeric class to check for
overflow during conversion.

BUG=chromium:596526

Committed:
https://pdfium.googlesource.com/pdfium/+/bc8a64029f898286c3dcad3a6cecdc98ef30...
==========

[commit-bot: I haz the power, 2016-05-19 18:37:18]

Committed patchset #1 (id:1) as
https://pdfium.googlesource.com/pdfium/+/bc8a64029f898286c3dcad3a6cecdc98ef30...