Set thread names to be visible in debuggers

Set thread names to be visible in debuggers

Like linux, on android we can get the thread names to show up in the
debugger by setting the process name for the LWP.

This change sets the name of the calling thread using prctl.

BUG=332881
R=jam@chromium.org
R=torne@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=250981

[Torne, 2014-02-10 12:05:08]

lgtm

[apatole, 2014-02-11 06:54:20]

The CQ bit was checked by apatole@nvidia.com

[commit-bot: I haz the power, 2014-02-11 06:54:27]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/apatole@nvidia.com/144943004/1

[commit-bot: I haz the power, 2014-02-11 07:25:45]

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

[commit-bot: I haz the power, 2014-02-11 07:25:46]

Retried try job too often on chromium_presubmit for step(s) presubmit
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=chromium_p...

[apatole, 2014-02-11 10:57:47]

On 2014/02/11 07:25:46, I haz the power (commit-bot) wrote:
> Retried try job too often on chromium_presubmit for step(s) presubmit
>
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=chromium_p...

Needs to be reviewed by OWNERS. I see only Jam in OWNERS list for
base/threading/ and looks like he is OOO till 21 Feb.

[Torne, 2014-02-11 11:12:28]

The comment in base/threading/OWNERS suggests jam only wants to insist on
reviewing threading_restrictions code. Ask someone from base/OWNERS instead.

[awong, 2014-02-13 01:12:37]

LGTM

[awong, 2014-02-13 01:12:54]

On 2014/02/13 01:12:37, awong wrote:
> LGTM

btw, usually much better to just pick one OWNER.

[apatole, 2014-02-13 05:43:26]

The CQ bit was checked by apatole@nvidia.com

[commit-bot: I haz the power, 2014-02-13 05:43:39]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/apatole@nvidia.com/144943004/1

[commit-bot: I haz the power, 2014-02-13 14:17:30]

Change committed as 250981