Revert of Move throttling of background timers into the renderer scheduler

Revert of Move throttling of background timers into the renderer scheduler (patchset #16 id:300001 of https://codereview.chromium.org/1441073006/ )

Reason for revert:
Oops I'd meant to upload one final patchset before committing.

Original issue's description:
> Move throttling of background timers into the renderer scheduler
>
> Not only does this simplify the code, it's more efficent since
> previously setting the timer alignment resulted in mass cancellation
> and reposting of timers.
>
> BUG=510398, 546953, 560402
>
> Committed: https://crrev.com/ec5adec0a9879a31866e98c65ddc7b506b9f49c3
> Cr-Commit-Position: refs/heads/master@{#361971}

TBR=jochen@chromium.org,skyostil@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=510398, 546953, 560402
Committed: https://crrev.com/8f37a89f30c1ccafd36a86369ff2f3b63b251ea1
Cr-Commit-Position: refs/heads/master@{#361972}

[alex clarke (OOO till 29th), 2015-11-27 10:11:11]

Created Revert of Move throttling of background timers into the renderer
scheduler

[commit-bot: I haz the power, 2015-11-27 10:11:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1477353002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1477353002/1

[commit-bot: I haz the power, 2015-11-27 10:13:07]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-27 10:14:19]

Description was changed from

==========
Revert of Move throttling of background timers into the renderer scheduler
(patchset #16 id:300001 of https://codereview.chromium.org/1441073006/ )

Reason for revert:
Oops I'd meant to upload one final patchset before committing.

Original issue's description:
> Move throttling of background timers into the renderer scheduler
> 
> Not only does this simplify the code, it's more efficent since
> previously setting the timer alignment resulted in mass cancellation
> and reposting of timers.
> 
> BUG=510398, 546953, 560402
> 
> Committed: https://crrev.com/ec5adec0a9879a31866e98c65ddc7b506b9f49c3
> Cr-Commit-Position: refs/heads/master@{#361971}

TBR=jochen@chromium.org,skyostil@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=510398, 546953, 560402
==========

to

==========
Revert of Move throttling of background timers into the renderer scheduler
(patchset #16 id:300001 of https://codereview.chromium.org/1441073006/ )

Reason for revert:
Oops I'd meant to upload one final patchset before committing.

Original issue's description:
> Move throttling of background timers into the renderer scheduler
>
> Not only does this simplify the code, it's more efficent since
> previously setting the timer alignment resulted in mass cancellation
> and reposting of timers.
>
> BUG=510398, 546953, 560402
>
> Committed: https://crrev.com/ec5adec0a9879a31866e98c65ddc7b506b9f49c3
> Cr-Commit-Position: refs/heads/master@{#361971}

TBR=jochen@chromium.org,skyostil@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=510398, 546953, 560402

Committed: https://crrev.com/8f37a89f30c1ccafd36a86369ff2f3b63b251ea1
Cr-Commit-Position: refs/heads/master@{#361972}
==========

[commit-bot: I haz the power, 2015-11-27 10:14:20]

Patchset 1 (id:??) landed as
https://crrev.com/8f37a89f30c1ccafd36a86369ff2f3b63b251ea1
Cr-Commit-Position: refs/heads/master@{#361972}