Revert of Disable PluginPowerSaverBrowserTest.BackgroundTabPlugins

Revert of Disable PluginPowerSaverBrowserTest.BackgroundTabPlugins (patchset #1 id:1 of https://codereview.chromium.org/2504113002/ )

Reason for revert:
Reverting this, because https://codereview.chromium.org/2504573003/ should have fixed the underlying issue. (Landed around the same time)

Original issue's description:
> Disable PluginPowerSaverBrowserTest.BackgroundTabPlugins.
>
> BUG=665706, 574266
> TBR=tommycli@chromium.org
>
> Committed: https://crrev.com/9bcbdb424425552223e7c589b81d4917ad9c1801
> Cr-Commit-Position: refs/heads/master@{#432392}

TBR=horo@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=665706, 574266
Committed: https://crrev.com/229242e4a11140a623e694c80160ca3565755e73
Cr-Commit-Position: refs/heads/master@{#432942}

[tommycli, 2016-11-17 19:03:26]

The CQ bit was checked by tommycli@chromium.org

[tommycli, 2016-11-17 19:03:27]

Created Revert of Disable PluginPowerSaverBrowserTest.BackgroundTabPlugins

[commit-bot: I haz the power, 2016-11-17 19:04:50]

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, 2016-11-17 20:14:15]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-17 20:29:11]

Description was changed from

==========
Revert of Disable PluginPowerSaverBrowserTest.BackgroundTabPlugins (patchset #1
id:1 of https://codereview.chromium.org/2504113002/ )

Reason for revert:
Reverting this, because https://codereview.chromium.org/2504573003/ should have
fixed the underlying issue. (Landed around the same time)

Original issue's description:
> Disable PluginPowerSaverBrowserTest.BackgroundTabPlugins.
> 
> BUG=665706,574266
> TBR=tommycli@chromium.org
> 
> Committed: https://crrev.com/9bcbdb424425552223e7c589b81d4917ad9c1801
> Cr-Commit-Position: refs/heads/master@{#432392}

TBR=horo@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=665706,574266
==========

to

==========
Revert of Disable PluginPowerSaverBrowserTest.BackgroundTabPlugins (patchset #1
id:1 of https://codereview.chromium.org/2504113002/ )

Reason for revert:
Reverting this, because https://codereview.chromium.org/2504573003/ should have
fixed the underlying issue. (Landed around the same time)

Original issue's description:
> Disable PluginPowerSaverBrowserTest.BackgroundTabPlugins.
>
> BUG=665706,574266
> TBR=tommycli@chromium.org
>
> Committed: https://crrev.com/9bcbdb424425552223e7c589b81d4917ad9c1801
> Cr-Commit-Position: refs/heads/master@{#432392}

TBR=horo@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=665706,574266

Committed: https://crrev.com/229242e4a11140a623e694c80160ca3565755e73
Cr-Commit-Position: refs/heads/master@{#432942}
==========

[commit-bot: I haz the power, 2016-11-17 20:29:17]

Patchset 1 (id:??) landed as
https://crrev.com/229242e4a11140a623e694c80160ca3565755e73
Cr-Commit-Position: refs/heads/master@{#432942}