Remove unused LifoWriteScheduler class.

Remove unused LifoWriteScheduler class.

Review-Url: https://codereview.chromium.org/2852993002
Cr-Commit-Position: refs/heads/master@{#468395}
Committed: https://chromium.googlesource.com/chromium/src/+/ba7a53053a967f5ee4b100a7463acebaa52a96ce

[Bence, 2017-05-01 14:32:22]

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

[commit-bot: I haz the power, 2017-05-01 14:32:34]

Dry run: 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, 2017-05-01 16:16:32]

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

[commit-bot: I haz the power, 2017-05-01 16:16:33]

Dry run: This issue passed the CQ dry run.

[Bence, 2017-05-01 17:47:02]

bnc@chromium.org changed reviewers:
+ xunjieli@chromium.org

[Bence, 2017-05-01 17:47:03]

xunjieli: PTAL.  Thank you.

[xunjieli, 2017-05-01 19:14:21]

lgtm

[Bence, 2017-05-01 19:52:39]

The CQ bit was checked by bnc@chromium.org

[commit-bot: I haz the power, 2017-05-01 19:53:13]

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, 2017-05-01 20:16:50]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493668359283970, "parent_rev":
"ba5c53c9efbb48cd5f54de19e996b24e63f511db", "commit_rev":
"ba7a53053a967f5ee4b100a7463acebaa52a96ce"}

[commit-bot: I haz the power, 2017-05-01 20:17:10]

Description was changed from

==========
Remove unused LifoWriteScheduler class.
==========

to

==========
Remove unused LifoWriteScheduler class.

Review-Url: https://codereview.chromium.org/2852993002
Cr-Commit-Position: refs/heads/master@{#468395}
Committed:
https://chromium.googlesource.com/chromium/src/+/ba7a53053a967f5ee4b100a7463a...
==========

[commit-bot: I haz the power, 2017-05-01 20:17:11]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/ba7a53053a967f5ee4b100a7463a...