Revert of Cleanup sign checking in safe math code

Revert of Cleanup sign checking in safe math code (patchset #1 id:1 of https://codereview.chromium.org/2564493003/ )

Reason for revert:
This change was not a performance improvement.

Original issue's description:
> Cleanup sign checking in safe math code
>
> Signed comparison is less code and matches the optimal compiler
> heuristics better than masking.
>
> TBR=scottmg
> NOTRY=true
>
> Committed: https://crrev.com/99bfa52d9dea53984ae4da5ee44eff0002928453
> Cr-Commit-Position: refs/heads/master@{#437342}

TBR=scottmg@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/f2896ed53d887af6aa4f61aa3eb508f2599c2708
Cr-Commit-Position: refs/heads/master@{#437580}

[jschuh, 2016-12-09 17:39:40]

The CQ bit was checked by jschuh@chromium.org

[jschuh, 2016-12-09 17:39:40]

Created Revert of Cleanup sign checking in safe math code

[commit-bot: I haz the power, 2016-12-09 17:40:18]

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, 2016-12-09 17:40:52]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1481305180221940, "parent_rev":
"ac6e0031e7a91e8197d05a0387d952a350501127", "commit_rev":
"b9053afb7e3844b8c39a9fe73280bdc8a7e9d451"}

[commit-bot: I haz the power, 2016-12-09 17:41:19]

Description was changed from

==========
Revert of Cleanup sign checking in safe math code (patchset #1 id:1 of
https://codereview.chromium.org/2564493003/ )

Reason for revert:
This change was not a performance improvement.

Original issue's description:
> Cleanup sign checking in safe math code
> 
> Signed comparison is less code and matches the optimal compiler
> heuristics better than masking.
> 
> TBR=scottmg
> NOTRY=true
> 
> Committed: https://crrev.com/99bfa52d9dea53984ae4da5ee44eff0002928453
> Cr-Commit-Position: refs/heads/master@{#437342}

TBR=scottmg@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
==========

to

==========
Revert of Cleanup sign checking in safe math code (patchset #1 id:1 of
https://codereview.chromium.org/2564493003/ )

Reason for revert:
This change was not a performance improvement.

Original issue's description:
> Cleanup sign checking in safe math code
> 
> Signed comparison is less code and matches the optimal compiler
> heuristics better than masking.
> 
> TBR=scottmg
> NOTRY=true
> 
> Committed: https://crrev.com/99bfa52d9dea53984ae4da5ee44eff0002928453
> Cr-Commit-Position: refs/heads/master@{#437342}

TBR=scottmg@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/2563003003
==========

[commit-bot: I haz the power, 2016-12-09 17:41:20]

Committed patchset #1 (id:1)

[scottmg, 2016-12-09 18:25:38]

lgtm

[commit-bot: I haz the power, 2016-12-12 14:35:59]

Description was changed from

==========
Revert of Cleanup sign checking in safe math code (patchset #1 id:1 of
https://codereview.chromium.org/2564493003/ )

Reason for revert:
This change was not a performance improvement.

Original issue's description:
> Cleanup sign checking in safe math code
> 
> Signed comparison is less code and matches the optimal compiler
> heuristics better than masking.
> 
> TBR=scottmg
> NOTRY=true
> 
> Committed: https://crrev.com/99bfa52d9dea53984ae4da5ee44eff0002928453
> Cr-Commit-Position: refs/heads/master@{#437342}

TBR=scottmg@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/2563003003
==========

to

==========
Revert of Cleanup sign checking in safe math code (patchset #1 id:1 of
https://codereview.chromium.org/2564493003/ )

Reason for revert:
This change was not a performance improvement.

Original issue's description:
> Cleanup sign checking in safe math code
>
> Signed comparison is less code and matches the optimal compiler
> heuristics better than masking.
>
> TBR=scottmg
> NOTRY=true
>
> Committed: https://crrev.com/99bfa52d9dea53984ae4da5ee44eff0002928453
> Cr-Commit-Position: refs/heads/master@{#437342}

TBR=scottmg@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/f2896ed53d887af6aa4f61aa3eb508f2599c2708
Cr-Commit-Position: refs/heads/master@{#437580}
==========

[commit-bot: I haz the power, 2016-12-12 14:36:02]

Patchset 1 (id:??) landed as
https://crrev.com/f2896ed53d887af6aa4f61aa3eb508f2599c2708
Cr-Commit-Position: refs/heads/master@{#437580}