Revert of image_decoder: Delay shutdown on idle

Revert of image_decoder: Delay shutdown on idle (patchset #1 id:1 of https://codereview.chromium.org/2538833004/ )

Reason for revert:
I did something stupid. Trivial UAF, will fix.

Original issue's description:
> image_decoder: Delay shutdown on idle
>
> Instead of immediately tearing down the image_decoder service
> once it's idle, wait 5 seconds in case there are going to be
> more requests soon.
>
> This mirrors the behavior of utility process image decoding
> prior to servicification, and is intended to address latency
> issues with multiple image decodes happening in quick (but not
> quite immediate) succession.
>
> BUG=669835
>
> Committed: https://crrev.com/0798a4585e6cb5df5e5596b8692656fca669cc28
> Cr-Commit-Position: refs/heads/master@{#435815}

TBR=ben@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=669835
Committed: https://crrev.com/7438bbcf5741f228b5c4059ab266dee53fcace62
Cr-Commit-Position: refs/heads/master@{#435932}

[Ken Rockot(use gerrit already), 2016-12-02 14:03:50]

The CQ bit was checked by rockot@chromium.org

[Ken Rockot(use gerrit already), 2016-12-02 14:03:50]

Created Revert of image_decoder: Delay shutdown on idle

[commit-bot: I haz the power, 2016-12-02 14:04:12]

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, 2016-12-02 14:04:51]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1480687430362540, "parent_rev":
"3a2dade5aeadcbabf37799bce9e0edf20f05137d", "commit_rev":
"e2f6abc7ddcf9f34a059f862b1fcf7c09e5cdf7d"}

[commit-bot: I haz the power, 2016-12-02 14:05:20]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-12-02 14:10:11]

Description was changed from

==========
Revert of image_decoder: Delay shutdown on idle (patchset #1 id:1 of
https://codereview.chromium.org/2538833004/ )

Reason for revert:
I did something stupid. Trivial UAF, will fix.

Original issue's description:
> image_decoder: Delay shutdown on idle
> 
> Instead of immediately tearing down the image_decoder service
> once it's idle, wait 5 seconds in case there are going to be
> more requests soon.
> 
> This mirrors the behavior of utility process image decoding
> prior to servicification, and is intended to address latency
> issues with multiple image decodes happening in quick (but not
> quite immediate) succession.
> 
> BUG=669835
> 
> Committed: https://crrev.com/0798a4585e6cb5df5e5596b8692656fca669cc28
> Cr-Commit-Position: refs/heads/master@{#435815}

TBR=ben@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=669835
==========

to

==========
Revert of image_decoder: Delay shutdown on idle (patchset #1 id:1 of
https://codereview.chromium.org/2538833004/ )

Reason for revert:
I did something stupid. Trivial UAF, will fix.

Original issue's description:
> image_decoder: Delay shutdown on idle
>
> Instead of immediately tearing down the image_decoder service
> once it's idle, wait 5 seconds in case there are going to be
> more requests soon.
>
> This mirrors the behavior of utility process image decoding
> prior to servicification, and is intended to address latency
> issues with multiple image decodes happening in quick (but not
> quite immediate) succession.
>
> BUG=669835
>
> Committed: https://crrev.com/0798a4585e6cb5df5e5596b8692656fca669cc28
> Cr-Commit-Position: refs/heads/master@{#435815}

TBR=ben@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=669835

Committed: https://crrev.com/7438bbcf5741f228b5c4059ab266dee53fcace62
Cr-Commit-Position: refs/heads/master@{#435932}
==========

[commit-bot: I haz the power, 2016-12-02 14:10:12]

Patchset 1 (id:??) landed as
https://crrev.com/7438bbcf5741f228b5c4059ab266dee53fcace62
Cr-Commit-Position: refs/heads/master@{#435932}