Revert of wtf/CheckedArithmetic.h delegates to base/numerics/safe_math.h.

Revert of wtf/CheckedArithmetic.h delegates to base/numerics/safe_math.h. (patchset #4 id:60001 of https://codereview.chromium.org/1814563002/ )

Reason for revert:
Chrome crashes in power.typical_10_mobile test on various Android bots.

BUG=597268
Original issue's description:
> wtf/CheckedArithmetic.h delegates to base/numerics/safe_math.h.
>
> CheckedArithmetic was essentially the same functionality as safe_math
> but had some edge cases it did not cover (e.g. size_t). Deleted the
> CheckedArithmetic implementation and had it forward to safe_math, and
> updated its callsites to use the latter's API.
>
> Committed: https://crrev.com/1465f844b54478a027711e86011a19214d8de24d
> Cr-Commit-Position: refs/heads/master@{#382773}

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

Committed: https://crrev.com/dc1e6dee244efea76741c796768707fa8d58afcb
Cr-Commit-Position: refs/heads/master@{#382855}

[aberent, 2016-03-23 16:12:20]

Created Revert of wtf/CheckedArithmetic.h delegates to
base/numerics/safe_math.h.

[commit-bot: I haz the power, 2016-03-23 16:12:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1822353002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1822353002/1

[commit-bot: I haz the power, 2016-03-23 16:13:08]

Description was changed from

==========
Revert of wtf/CheckedArithmetic.h delegates to base/numerics/safe_math.h.
(patchset #4 id:60001 of https://codereview.chromium.org/1814563002/ )

Reason for revert:
Chrome crashes in power.typical_10_mobile test on various Android bots.

BUG=597268

Original issue's description:
> wtf/CheckedArithmetic.h delegates to base/numerics/safe_math.h.
> 
> CheckedArithmetic was essentially the same functionality as safe_math
> but had some edge cases it did not cover (e.g. size_t). Deleted the
> CheckedArithmetic implementation and had it forward to safe_math, and
> updated its callsites to use the latter's API.
> 
> Committed: https://crrev.com/1465f844b54478a027711e86011a19214d8de24d
> Cr-Commit-Position: refs/heads/master@{#382773}

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

to

==========
Revert of wtf/CheckedArithmetic.h delegates to base/numerics/safe_math.h.
(patchset #4 id:60001 of https://codereview.chromium.org/1814563002/ )

Reason for revert:
Chrome crashes in power.typical_10_mobile test on various Android bots.

BUG=597268

Original issue's description:
> wtf/CheckedArithmetic.h delegates to base/numerics/safe_math.h.
> 
> CheckedArithmetic was essentially the same functionality as safe_math
> but had some edge cases it did not cover (e.g. size_t). Deleted the
> CheckedArithmetic implementation and had it forward to safe_math, and
> updated its callsites to use the latter's API.
> 
> Committed: https://crrev.com/1465f844b54478a027711e86011a19214d8de24d
> Cr-Commit-Position: refs/heads/master@{#382773}

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

[commit-bot: I haz the power, 2016-03-23 16:13:09]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-23 16:15:08]

Description was changed from

==========
Revert of wtf/CheckedArithmetic.h delegates to base/numerics/safe_math.h.
(patchset #4 id:60001 of https://codereview.chromium.org/1814563002/ )

Reason for revert:
Chrome crashes in power.typical_10_mobile test on various Android bots.

BUG=597268

Original issue's description:
> wtf/CheckedArithmetic.h delegates to base/numerics/safe_math.h.
> 
> CheckedArithmetic was essentially the same functionality as safe_math
> but had some edge cases it did not cover (e.g. size_t). Deleted the
> CheckedArithmetic implementation and had it forward to safe_math, and
> updated its callsites to use the latter's API.
> 
> Committed: https://crrev.com/1465f844b54478a027711e86011a19214d8de24d
> Cr-Commit-Position: refs/heads/master@{#382773}

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

to

==========
Revert of wtf/CheckedArithmetic.h delegates to base/numerics/safe_math.h.
(patchset #4 id:60001 of https://codereview.chromium.org/1814563002/ )

Reason for revert:
Chrome crashes in power.typical_10_mobile test on various Android bots.

BUG=597268

Original issue's description:
> wtf/CheckedArithmetic.h delegates to base/numerics/safe_math.h.
>
> CheckedArithmetic was essentially the same functionality as safe_math
> but had some edge cases it did not cover (e.g. size_t). Deleted the
> CheckedArithmetic implementation and had it forward to safe_math, and
> updated its callsites to use the latter's API.
>
> Committed: https://crrev.com/1465f844b54478a027711e86011a19214d8de24d
> Cr-Commit-Position: refs/heads/master@{#382773}

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

Committed: https://crrev.com/dc1e6dee244efea76741c796768707fa8d58afcb
Cr-Commit-Position: refs/heads/master@{#382855}
==========

[commit-bot: I haz the power, 2016-03-23 16:15:10]

Patchset 1 (id:??) landed as
https://crrev.com/dc1e6dee244efea76741c796768707fa8d58afcb
Cr-Commit-Position: refs/heads/master@{#382855}

[haraken, 2016-03-23 16:19:07]

LGTM to revert.