Remove trivially-true DEBUG_CHECKs in safe_sprintf.cc

Remove trivially-true DEBUG_CHECKs in safe_sprintf.cc

There are some DEBUG_CHECKs here verifying that a size_t is >= 0. Since a size_t is unsigned, these are trivially true and with the default warning settings for CrOS builds, the warning generated here will cause a build failure.

BUG=424334
TEST=ensure existing builds pass

Committed: https://crrev.com/0adaa53ff018efd21bc30b37decf98a3df5d884e
Cr-Commit-Position: refs/heads/master@{#300025}

[Chris Masone, 2014-10-16 16:32:17]

cmasone@chromium.org changed reviewers:
+ thestig@chromium.org

[Chris Masone, 2014-10-16 16:33:20]

On 2014/10/16 16:32:17, Chris Masone wrote:
> mailto:cmasone@chromium.org changed reviewers:
> + mailto:thestig@chromium.org

Lei, do you think it's safe to remove these checks? I dunno if Markus still
reviews changes...

[jln (very slow on Chromium), 2014-10-16 17:46:44]

lgtm

[jln (very slow on Chromium), 2014-10-16 17:48:39]

Lei: for some reason I'm not in that OWNERS file, do you mind approving this
until I change it?

[Chris Masone, 2014-10-16 21:03:48]

cmasone@chromium.org changed reviewers:
+ jln@chromium.org

[Chris Masone, 2014-10-16 21:03:48]

cmasone@chromium.org changed required reviewers:
+ thestig@chromium.org

[Lei Zhang, 2014-10-16 21:12:31]

lgtm

[Chris Masone, 2014-10-16 21:14:17]

The CQ bit was checked by cmasone@chromium.org

[Chris Masone, 2014-10-16 21:14:37]

The CQ bit was checked by cmasone@chromium.org

[commit-bot: I haz the power, 2014-10-16 21:16:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/642263006/1

[commit-bot: I haz the power, 2014-10-16 21:48:18]

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

[commit-bot: I haz the power, 2014-10-16 21:48:19]

Try jobs failed on following builders:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[Chris Masone, 2014-10-16 22:15:26]

The CQ bit was checked by cmasone@chromium.org

[commit-bot: I haz the power, 2014-10-16 22:17:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/642263006/1

[commit-bot: I haz the power, 2014-10-16 22:39:47]

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

[commit-bot: I haz the power, 2014-10-16 22:39:48]

Try jobs failed on following builders:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[Chris Masone, 2014-10-17 00:26:45]

The CQ bit was checked by cmasone@chromium.org

[commit-bot: I haz the power, 2014-10-17 00:29:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/642263006/1

[commit-bot: I haz the power, 2014-10-17 00:31:55]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-17 00:32:42]

Patchset 1 (id:??) landed as
https://crrev.com/0adaa53ff018efd21bc30b37decf98a3df5d884e
Cr-Commit-Position: refs/heads/master@{#300025}