[scheduler] Refactor common code into BudgetPool.

[scheduler] Refactor common code into BudgetPool.

In preparation to introduction of WakeupBudgetPool, move common code
from CPUTimeBudgetPool into BudgetPool.

R=skyostil@chromium.org,alexclarke@chromium.org
BUG=699541
Review-Url: https://codereview.chromium.org/2778743004
Cr-Commit-Position: refs/heads/master@{#460084}
Committed: https://chromium.googlesource.com/chromium/src/+/c15fed41a2b548c5aaa5959c8a0c9498f4f38617

[altimin, 2017-03-28 11:42:49]

PTAL

[altimin, 2017-03-28 11:43:26]

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

[commit-bot: I haz the power, 2017-03-28 11:43:34]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[alex clarke (OOO till 29th), 2017-03-28 12:28:33]

lgtm

[Sami, 2017-03-28 12:32:18]

lgtm.

[commit-bot: I haz the power, 2017-03-28 13:40:02]

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

[commit-bot: I haz the power, 2017-03-28 13:40:03]

Dry run: This issue passed the CQ dry run.

[altimin, 2017-03-28 13:48:47]

The CQ bit was checked by altimin@chromium.org

[commit-bot: I haz the power, 2017-03-28 13:49:04]

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, 2017-03-28 13:53:19]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1490708927911790, "parent_rev":
"c2c38dc205e4ecce6a316deeaddd41c03a502cd7", "commit_rev":
"c15fed41a2b548c5aaa5959c8a0c9498f4f38617"}

[commit-bot: I haz the power, 2017-03-28 13:54:06]

Description was changed from

==========
[scheduler] Refactor common code into BudgetPool.

In preparation to introduction of WakeupBudgetPool, move common code
from CPUTimeBudgetPool into BudgetPool.

R=skyostil@chromium.org,alexclarke@chromium.org
BUG=699541
==========

to

==========
[scheduler] Refactor common code into BudgetPool.

In preparation to introduction of WakeupBudgetPool, move common code
from CPUTimeBudgetPool into BudgetPool.

R=skyostil@chromium.org,alexclarke@chromium.org
BUG=699541

Review-Url: https://codereview.chromium.org/2778743004
Cr-Commit-Position: refs/heads/master@{#460084}
Committed:
https://chromium.googlesource.com/chromium/src/+/c15fed41a2b548c5aaa5959c8a0c...
==========

[commit-bot: I haz the power, 2017-03-28 13:54:06]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/c15fed41a2b548c5aaa5959c8a0c...