[Merge to 55.0.2846.2] Revert of Fix memory leak in ThreadWatcher. (patchset #3 id:40001 of https:/…

[Merge to 55.0.2846.2] Revert of Fix memory leak in ThreadWatcher. (patchset #3 id:40001 of https://codereview.chromium.org/2295983002/ )

Reason for revert:
Current Canary is unusable due to browser process crashes in line 88 (Windows) and 389 (Mac) in thread_watcher.cc, see crbug.com/643109.

Original issue's description:
> Fix memory leak in ThreadWatcher.
>
> BUG=none
> TEST=unit tests
>
> Committed: https://crrev.com/5ca77e86703646cb84be35ef827068ac6951be1e
> Cr-Commit-Position: refs/heads/master@{#415729}

TBR=isherman@chromium.org,rtenneti@chromium.org,wzhong@chromium.org,alokp@chromium.org,jlevasseur@chromium.org
NOPRESUBMIT=true
NOTRY=true
BUG=643109
Review-Url: https://codereview.chromium.org/2299453005
Cr-Commit-Position: refs/heads/master@{#415955}
(cherry picked from commit ec1da671f97f53a3fa24505c80593229264941fd)

Committed: https://chromium.googlesource.com/chromium/src/+/1917cde9d763b20e310b04da3c8d336b2fafbc5b

[gab, 2016-09-01 15:23:03]

TBR for merge to Canary tip.

[gab, 2016-09-01 15:28:35]

Description was changed from

==========
[Merge to 55.0.2846.2] Revert of Fix memory leak in ThreadWatcher. (patchset #3
id:40001 of https://codereview.chromium.org/2295983002/ )

Reason for revert:
Current Canary is unusable due to browser process crashes in line 88 (Windows)
and 389 (Mac) in thread_watcher.cc, see crbug.com/643109.

Original issue's description:
> Fix memory leak in ThreadWatcher.
>
> BUG=none
> TEST=unit tests
>
> Committed: https://crrev.com/5ca77e86703646cb84be35ef827068ac6951be1e
> Cr-Commit-Position: refs/heads/master@{#415729}

TBR=isherman@chromium.org,rtenneti@chromium.org,wzhong@chromium.org,alokp@chr...
NOPRESUBMIT=true
NOTRY=true
BUG=643109

Review-Url: https://codereview.chromium.org/2299453005
Cr-Commit-Position: refs/heads/master@{#415955}
(cherry picked from commit ec1da671f97f53a3fa24505c80593229264941fd)
==========

to

==========
[Merge to 55.0.2846.2] Revert of Fix memory leak in ThreadWatcher. (patchset #3
id:40001 of https://codereview.chromium.org/2295983002/ )

Reason for revert:
Current Canary is unusable due to browser process crashes in line 88 (Windows)
and 389 (Mac) in thread_watcher.cc, see crbug.com/643109.

Original issue's description:
> Fix memory leak in ThreadWatcher.
>
> BUG=none
> TEST=unit tests
>
> Committed: https://crrev.com/5ca77e86703646cb84be35ef827068ac6951be1e
> Cr-Commit-Position: refs/heads/master@{#415729}

TBR=isherman@chromium.org,rtenneti@chromium.org,wzhong@chromium.org,alokp@chr...
NOPRESUBMIT=true
NOTRY=true
BUG=643109

Review-Url: https://codereview.chromium.org/2299453005
Cr-Commit-Position: refs/heads/master@{#415955}
(cherry picked from commit ec1da671f97f53a3fa24505c80593229264941fd)

Committed:
https://chromium.googlesource.com/chromium/src/+/1917cde9d763b20e310b04da3c8d...
==========

[gab, 2016-09-01 15:28:37]

Committed patchset #1 (id:1) manually as
1917cde9d763b20e310b04da3c8d336b2fafbc5b (presubmit successful).