Revert of base: Avoid unnecessary allocations in base::FindThreadID.

Revert of base: Avoid unnecessary allocations in base::FindThreadID. (patchset #2 id:20001 of https://codereview.chromium.org/2882583003/ )

Reason for revert:
Causing crash: [FATAL:linux_util.cc(212)] Check failed: split_value_str.size() >= 3u (2 vs. 3)

Original issue's description:
> base: Avoid unnecessary allocations in base::FindThreadID.
> 
> Improve parsing by using StringTokenizer.
> 
> BUG=708765
> 
> Review-Url: https://codereview.chromium.org/2882583003
> Cr-Commit-Position: refs/heads/master@{#474077}
> Committed: https://chromium.googlesource.com/chromium/src/+/293c72b48fb321d33d6b06147807de9e4000924e

TBR=brettw@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=708765
Review-Url: https://codereview.chromium.org/2900323002
Cr-Commit-Position: refs/heads/master@{#474297}
Committed: https://chromium.googlesource.com/chromium/src/+/7ba6d9f9c06b206a69593c141daf2164f3ca5322

[reveman, 2017-05-24 15:35:52]

The CQ bit was checked by reveman@chromium.org

[reveman, 2017-05-24 15:35:53]

Created Revert of base: Avoid unnecessary allocations in base::FindThreadID.

[commit-bot: I haz the power, 2017-05-24 15:36:21]

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, 2017-05-24 15:36:49]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1495640152819950, "parent_rev":
"28893b43fe6a3159d55b2a0987aac95ad6663090", "commit_rev":
"7ba6d9f9c06b206a69593c141daf2164f3ca5322"}

[commit-bot: I haz the power, 2017-05-24 15:37:01]

Description was changed from

==========
Revert of base: Avoid unnecessary allocations in base::FindThreadID. (patchset
#2 id:20001 of https://codereview.chromium.org/2882583003/ )

Reason for revert:
Causing crash: [FATAL:linux_util.cc(212)] Check failed: split_value_str.size()
>= 3u (2 vs. 3)

Original issue's description:
> base: Avoid unnecessary allocations in base::FindThreadID.
> 
> Improve parsing by using StringTokenizer.
> 
> BUG=708765
> 
> Review-Url: https://codereview.chromium.org/2882583003
> Cr-Commit-Position: refs/heads/master@{#474077}
> Committed:
https://chromium.googlesource.com/chromium/src/+/293c72b48fb321d33d6b06147807...

TBR=brettw@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=708765
==========

to

==========
Revert of base: Avoid unnecessary allocations in base::FindThreadID. (patchset
#2 id:20001 of https://codereview.chromium.org/2882583003/ )

Reason for revert:
Causing crash: [FATAL:linux_util.cc(212)] Check failed: split_value_str.size()
>= 3u (2 vs. 3)

Original issue's description:
> base: Avoid unnecessary allocations in base::FindThreadID.
> 
> Improve parsing by using StringTokenizer.
> 
> BUG=708765
> 
> Review-Url: https://codereview.chromium.org/2882583003
> Cr-Commit-Position: refs/heads/master@{#474077}
> Committed:
https://chromium.googlesource.com/chromium/src/+/293c72b48fb321d33d6b06147807...

TBR=brettw@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=708765

Review-Url: https://codereview.chromium.org/2900323002
Cr-Commit-Position: refs/heads/master@{#474297}
Committed:
https://chromium.googlesource.com/chromium/src/+/7ba6d9f9c06b206a69593c141daf...
==========

[commit-bot: I haz the power, 2017-05-24 15:37:02]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/7ba6d9f9c06b206a69593c141daf...