Remove unnecessary inclusion of sys/syscall.h in base/logging.cc

Remove unnecessary inclusion of sys/syscall.h in base/logging.cc

The inclusion of sys/syscall.h was introduced in crrev.com/4916 to
obtain the current thread ID via `syscall(__NR_gettid)`. The code was
later changed in crrev.com/118152 to use
`base::PlatformThread::CurrentId()` instead. The inclusion of
sys/syscall.h is no longer needed and thus removed by this CL.

BUG=None

Committed: https://crrev.com/3bf198b69c4ab5b2ebf0ebc6b5ddf285302be863
Cr-Commit-Position: refs/heads/master@{#381735}

[Ben Chan, 2016-03-17 00:45:38]

Description was changed from

==========
Remove unnecessary inclusion of sys/syscall.h in base/logging.cc

The inclusion of sys/syscall.h was introduced in crrev.com/4916 to
obtain the current thread ID via `syscall(__NR_gettid)`. The code was
later changed in crrev.com/118152 to use
`base::PlatformThread::CurrentId()` instead. The inclusion of
sys/syscall.h is no longer needed and thus removed by this CL.

BUG=None
==========

to

==========
Remove unnecessary inclusion of sys/syscall.h in base/logging.cc

The inclusion of sys/syscall.h was introduced in crrev.com/4916 to
obtain the current thread ID via `syscall(__NR_gettid)`. The code was
later changed in crrev.com/118152 to use
`base::PlatformThread::CurrentId()` instead. The inclusion of
sys/syscall.h is no longer needed and thus removed by this CL.

BUG=None
==========

[Ben Chan, 2016-03-17 00:45:38]

benchan@chromium.org changed reviewers:
+ mark@chromium.org

[Ben Chan, 2016-03-17 02:01:38]

The CQ bit was checked by benchan@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-03-17 02:02:03]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1812733002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1812733002/1

[commit-bot: I haz the power, 2016-03-17 03:26:37]

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

[commit-bot: I haz the power, 2016-03-17 03:26:38]

Dry run: This issue passed the CQ dry run.

[Mark Mentovai, 2016-03-17 12:18:08]

LGTM

[Ben Chan, 2016-03-17 17:07:44]

The CQ bit was checked by benchan@chromium.org

[commit-bot: I haz the power, 2016-03-17 17:07:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1812733002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1812733002/1

[commit-bot: I haz the power, 2016-03-17 17:12:40]

Description was changed from

==========
Remove unnecessary inclusion of sys/syscall.h in base/logging.cc

The inclusion of sys/syscall.h was introduced in crrev.com/4916 to
obtain the current thread ID via `syscall(__NR_gettid)`. The code was
later changed in crrev.com/118152 to use
`base::PlatformThread::CurrentId()` instead. The inclusion of
sys/syscall.h is no longer needed and thus removed by this CL.

BUG=None
==========

to

==========
Remove unnecessary inclusion of sys/syscall.h in base/logging.cc

The inclusion of sys/syscall.h was introduced in crrev.com/4916 to
obtain the current thread ID via `syscall(__NR_gettid)`. The code was
later changed in crrev.com/118152 to use
`base::PlatformThread::CurrentId()` instead. The inclusion of
sys/syscall.h is no longer needed and thus removed by this CL.

BUG=None
==========

[commit-bot: I haz the power, 2016-03-17 17:12:42]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-17 17:14:29]

Description was changed from

==========
Remove unnecessary inclusion of sys/syscall.h in base/logging.cc

The inclusion of sys/syscall.h was introduced in crrev.com/4916 to
obtain the current thread ID via `syscall(__NR_gettid)`. The code was
later changed in crrev.com/118152 to use
`base::PlatformThread::CurrentId()` instead. The inclusion of
sys/syscall.h is no longer needed and thus removed by this CL.

BUG=None
==========

to

==========
Remove unnecessary inclusion of sys/syscall.h in base/logging.cc

The inclusion of sys/syscall.h was introduced in crrev.com/4916 to
obtain the current thread ID via `syscall(__NR_gettid)`. The code was
later changed in crrev.com/118152 to use
`base::PlatformThread::CurrentId()` instead. The inclusion of
sys/syscall.h is no longer needed and thus removed by this CL.

BUG=None

Committed: https://crrev.com/3bf198b69c4ab5b2ebf0ebc6b5ddf285302be863
Cr-Commit-Position: refs/heads/master@{#381735}
==========

[commit-bot: I haz the power, 2016-03-17 17:14:30]

Patchset 1 (id:??) landed as
https://crrev.com/3bf198b69c4ab5b2ebf0ebc6b5ddf285302be863
Cr-Commit-Position: refs/heads/master@{#381735}