Revert of Remove SequencedWorkerPool::GetNamedSequenceToken from content::CreateFileSystemContext.

Revert of Remove usage of SequencedWorkerPool::GetNamedSequenceToken from content::CreateFileSystemContext. (patchset #1 id:1 of https://codereview.chromium.org/2883403002/ )

Reason for revert:
Seems to cause data races, since different FileSystemContexts are no longer sharing the same sequence.

Original issue's description:
> Remove usage of SequencedWorkerPool::GetNamedSequenceToken from content::CreateFileSystemContext.
> 
> SequencedWorkerPool is being deprecated in favor of TaskScheduler.
> 
> BUG=667892
> 
> Review-Url: https://codereview.chromium.org/2883403002
> Cr-Commit-Position: refs/heads/master@{#474638}
> Committed: https://chromium.googlesource.com/chromium/src/+/bb731a6137ac921a8aa465613acab752b16f4666

TBR=tzik@chromium.org,fdoray@chromium.org
BUG=667892
NOPRESUBMIT=true

Review-Url: https://codereview.chromium.org/2969293003
Cr-Commit-Position: refs/heads/master@{#484638}
Committed: https://chromium.googlesource.com/chromium/src/+/55a9844c4ce86bff603ae7662c399350e6ba6d40

[Marijn Kruisselbrink, 2017-07-05 21:15:03]

Created Revert of Remove usage of SequencedWorkerPool::GetNamedSequenceToken
from content::CreateFileSystemContext.

[Marijn Kruisselbrink, 2017-07-05 21:15:12]

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

[Marijn Kruisselbrink, 2017-07-05 21:15:55]

Description was changed from

==========
Revert of Remove usage of SequencedWorkerPool::GetNamedSequenceToken from
content::CreateFileSystemContext. (patchset #1 id:1 of
https://codereview.chromium.org/2883403002/ )

Reason for revert:
Seems to cause data races, since different FileSystemContexts are no longer
sharing the same sequence.

Original issue's description:
> Remove usage of SequencedWorkerPool::GetNamedSequenceToken from
content::CreateFileSystemContext.
> 
> SequencedWorkerPool is being deprecated in favor of TaskScheduler.
> 
> BUG=667892
> 
> Review-Url: https://codereview.chromium.org/2883403002
> Cr-Commit-Position: refs/heads/master@{#474638}
> Committed:
https://chromium.googlesource.com/chromium/src/+/bb731a6137ac921a8aa465613aca...

TBR=tzik@chromium.org,fdoray@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=667892
==========

to

==========
Revert of Remove usage of SequencedWorkerPool::GetNamedSequenceToken from
content::CreateFileSystemContext. (patchset #1 id:1 of
https://codereview.chromium.org/2883403002/ )

Reason for revert:
Seems to cause data races, since different FileSystemContexts are no longer
sharing the same sequence.

Original issue's description:
> Remove usage of SequencedWorkerPool::GetNamedSequenceToken from
content::CreateFileSystemContext.
> 
> SequencedWorkerPool is being deprecated in favor of TaskScheduler.
> 
> BUG=667892
> 
> Review-Url: https://codereview.chromium.org/2883403002
> Cr-Commit-Position: refs/heads/master@{#474638}
> Committed:
https://chromium.googlesource.com/chromium/src/+/bb731a6137ac921a8aa465613aca...

BUG=667892
==========

[commit-bot: I haz the power, 2017-07-05 21:24:03]

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

[commit-bot: I haz the power, 2017-07-05 21:24:04]

Dry run: Try jobs failed on following builders:
  chromium_presubmit on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[Marijn Kruisselbrink, 2017-07-05 21:25:07]

Since not sharing the same sequence is clearly problematic in the current
codebase, and I don't really have the intention of digging in deeper to see if
that can be fixed somehow and/or what the correct fix is, I'd like to just
revert this for now.

[Marijn Kruisselbrink, 2017-07-06 16:23:53]

Description was changed from

==========
Revert of Remove usage of SequencedWorkerPool::GetNamedSequenceToken from
content::CreateFileSystemContext. (patchset #1 id:1 of
https://codereview.chromium.org/2883403002/ )

Reason for revert:
Seems to cause data races, since different FileSystemContexts are no longer
sharing the same sequence.

Original issue's description:
> Remove usage of SequencedWorkerPool::GetNamedSequenceToken from
content::CreateFileSystemContext.
> 
> SequencedWorkerPool is being deprecated in favor of TaskScheduler.
> 
> BUG=667892
> 
> Review-Url: https://codereview.chromium.org/2883403002
> Cr-Commit-Position: refs/heads/master@{#474638}
> Committed:
https://chromium.googlesource.com/chromium/src/+/bb731a6137ac921a8aa465613aca...

BUG=667892
==========

to

==========
Revert of Remove usage of SequencedWorkerPool::GetNamedSequenceToken from
content::CreateFileSystemContext. (patchset #1 id:1 of
https://codereview.chromium.org/2883403002/ )

Reason for revert:
Seems to cause data races, since different FileSystemContexts are no longer
sharing the same sequence.

Original issue's description:
> Remove usage of SequencedWorkerPool::GetNamedSequenceToken from
content::CreateFileSystemContext.
> 
> SequencedWorkerPool is being deprecated in favor of TaskScheduler.
> 
> BUG=667892
> 
> Review-Url: https://codereview.chromium.org/2883403002
> Cr-Commit-Position: refs/heads/master@{#474638}
> Committed:
https://chromium.googlesource.com/chromium/src/+/bb731a6137ac921a8aa465613aca...

TBR=tzik@chromium.org,fdoray@chromium.org
BUG=667892
NOPRESUBMIT=true
==========

[Marijn Kruisselbrink, 2017-07-06 16:24:09]

The CQ bit was checked by mek@chromium.org

[commit-bot: I haz the power, 2017-07-06 16:24:20]

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, 2017-07-06 16:57:07]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1499358249524990, "parent_rev":
"ddc753934758db1cccdfc5491af7b58735a5c6f2", "commit_rev":
"55a9844c4ce86bff603ae7662c399350e6ba6d40"}

[commit-bot: I haz the power, 2017-07-06 16:57:20]

Description was changed from

==========
Revert of Remove usage of SequencedWorkerPool::GetNamedSequenceToken from
content::CreateFileSystemContext. (patchset #1 id:1 of
https://codereview.chromium.org/2883403002/ )

Reason for revert:
Seems to cause data races, since different FileSystemContexts are no longer
sharing the same sequence.

Original issue's description:
> Remove usage of SequencedWorkerPool::GetNamedSequenceToken from
content::CreateFileSystemContext.
> 
> SequencedWorkerPool is being deprecated in favor of TaskScheduler.
> 
> BUG=667892
> 
> Review-Url: https://codereview.chromium.org/2883403002
> Cr-Commit-Position: refs/heads/master@{#474638}
> Committed:
https://chromium.googlesource.com/chromium/src/+/bb731a6137ac921a8aa465613aca...

TBR=tzik@chromium.org,fdoray@chromium.org
BUG=667892
NOPRESUBMIT=true
==========

to

==========
Revert of Remove usage of SequencedWorkerPool::GetNamedSequenceToken from
content::CreateFileSystemContext. (patchset #1 id:1 of
https://codereview.chromium.org/2883403002/ )

Reason for revert:
Seems to cause data races, since different FileSystemContexts are no longer
sharing the same sequence.

Original issue's description:
> Remove usage of SequencedWorkerPool::GetNamedSequenceToken from
content::CreateFileSystemContext.
> 
> SequencedWorkerPool is being deprecated in favor of TaskScheduler.
> 
> BUG=667892
> 
> Review-Url: https://codereview.chromium.org/2883403002
> Cr-Commit-Position: refs/heads/master@{#474638}
> Committed:
https://chromium.googlesource.com/chromium/src/+/bb731a6137ac921a8aa465613aca...

TBR=tzik@chromium.org,fdoray@chromium.org
BUG=667892
NOPRESUBMIT=true

Review-Url: https://codereview.chromium.org/2969293003
Cr-Commit-Position: refs/heads/master@{#484638}
Committed:
https://chromium.googlesource.com/chromium/src/+/55a9844c4ce86bff603ae7662c39...
==========

[commit-bot: I haz the power, 2017-07-06 16:57:22]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/55a9844c4ce86bff603ae7662c39...