Add a checked_cast for size_t to uint32_t conversion.

Add a checked_cast for size_t to uint32_t conversion.

This should never be hit since we don't allocate more than 2 GB, but it's best practice to ensure so.

BUG=581409
Committed: https://crrev.com/a3a30cc274921b9124e92ac01a107c11874bda37
Cr-Commit-Position: refs/heads/master@{#374688}

[jam, 2016-02-10 15:41:00]

jam@chromium.org changed reviewers:
+ tsepez@chromium.org

[Tom Sepez, 2016-02-10 17:55:49]

lgtm

[jam, 2016-02-10 17:59:13]

The CQ bit was checked by jam@chromium.org

[commit-bot: I haz the power, 2016-02-10 18:00:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1683033002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1683033002/1

[commit-bot: I haz the power, 2016-02-10 18:15:14]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-10 18:16:18]

Description was changed from

==========
Add a checked_cast for size_t to uint32_t conversion.

This should never be hit since we don't allocate more than 2 GB, but it's best
practice to ensure so.

BUG=581409
==========

to

==========
Add a checked_cast for size_t to uint32_t conversion.

This should never be hit since we don't allocate more than 2 GB, but it's best
practice to ensure so.

BUG=581409

Committed: https://crrev.com/a3a30cc274921b9124e92ac01a107c11874bda37
Cr-Commit-Position: refs/heads/master@{#374688}
==========

[commit-bot: I haz the power, 2016-02-10 18:16:19]

Patchset 1 (id:??) landed as
https://crrev.com/a3a30cc274921b9124e92ac01a107c11874bda37
Cr-Commit-Position: refs/heads/master@{#374688}