Revert of Idle cleanup for worker context

Revert of Idle cleanup for worker context (patchset #5 id:200001 of https://codereview.chromium.org/2353033003/ )

Reason for revert:
This appears to be breaking some number of unittests - need to investigate further.

Original issue's description:
> Idle cleanup for worker context
>
> Currently, Skia flushes unused items out of its caches after ~1 second
> of non-use (50 flushes). This works fine while Skia is in-use, but when
> a worker context goes idle we stop calling into Skia altogether. This
> means that Skia will never flush out unused cache items from the last
> piece of work it did. This can lead to some rather large temporaries
> being kept around (~20mb).
>
> This change adds an idle cleanup process which flushes Skia's caches
> and cleans up worker context resources after a worker context is idle
> for 1 second.
>
> BUG=624630
> CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel
>
> Committed: https://crrev.com/051ae83bf29b52cefd82235ebfb90f203912afbb
> Cr-Commit-Position: refs/heads/master@{#420496}

TBR=danakj@chromium.org,jbauman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=624630
Committed: https://crrev.com/a5ce62a749a47a57f8b3b2734eea4cec31e39d9c
Cr-Commit-Position: refs/heads/master@{#420741}

[ericrk, 2016-09-23 21:36:42]

The CQ bit was checked by ericrk@chromium.org

[ericrk, 2016-09-23 21:36:42]

Created Revert of Idle cleanup for worker context

[commit-bot: I haz the power, 2016-09-23 21:38:26]

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, 2016-09-23 21:51:59]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-23 21:53:54]

Description was changed from

==========
Revert of Idle cleanup for worker context (patchset #5 id:200001 of
https://codereview.chromium.org/2353033003/ )

Reason for revert:
This appears to be breaking some number of unittests - need to investigate
further.

Original issue's description:
> Idle cleanup for worker context
> 
> Currently, Skia flushes unused items out of its caches after ~1 second
> of non-use (50 flushes). This works fine while Skia is in-use, but when
> a worker context goes idle we stop calling into Skia altogether. This
> means that Skia will never flush out unused cache items from the last
> piece of work it did. This can lead to some rather large temporaries
> being kept around (~20mb).
> 
> This change adds an idle cleanup process which flushes Skia's caches
> and cleans up worker context resources after a worker context is idle
> for 1 second.
> 
> BUG=624630
> CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel
> 
> Committed: https://crrev.com/051ae83bf29b52cefd82235ebfb90f203912afbb
> Cr-Commit-Position: refs/heads/master@{#420496}

TBR=danakj@chromium.org,jbauman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=624630
==========

to

==========
Revert of Idle cleanup for worker context (patchset #5 id:200001 of
https://codereview.chromium.org/2353033003/ )

Reason for revert:
This appears to be breaking some number of unittests - need to investigate
further.

Original issue's description:
> Idle cleanup for worker context
>
> Currently, Skia flushes unused items out of its caches after ~1 second
> of non-use (50 flushes). This works fine while Skia is in-use, but when
> a worker context goes idle we stop calling into Skia altogether. This
> means that Skia will never flush out unused cache items from the last
> piece of work it did. This can lead to some rather large temporaries
> being kept around (~20mb).
>
> This change adds an idle cleanup process which flushes Skia's caches
> and cleans up worker context resources after a worker context is idle
> for 1 second.
>
> BUG=624630
> CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel
>
> Committed: https://crrev.com/051ae83bf29b52cefd82235ebfb90f203912afbb
> Cr-Commit-Position: refs/heads/master@{#420496}

TBR=danakj@chromium.org,jbauman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=624630

Committed: https://crrev.com/a5ce62a749a47a57f8b3b2734eea4cec31e39d9c
Cr-Commit-Position: refs/heads/master@{#420741}
==========

[commit-bot: I haz the power, 2016-09-23 21:53:55]

Patchset 1 (id:??) landed as
https://crrev.com/a5ce62a749a47a57f8b3b2734eea4cec31e39d9c
Cr-Commit-Position: refs/heads/master@{#420741}