Revert of Enable BeginFrame scheduling on aura

Revert of Enable BeginFrame scheduling on aura (patchset #12 id:210001 of https://codereview.chromium.org/1016033006/)

Reason for revert:
Bots are failing:
AutofillInteractiveTest.AutofillFormWithNonAutofillableField
WebViewTest.InterstitialTeardown
TouchExplorationTest.RewritesEventsWhenOn

Not sure if it's this CL but reverting to see.

Original issue's description:
> Enable BeginFrame scheduling on aura
>
> This cl is last partial cl from https://codereview.chromium.org/775143003/
> for easy review.
> Until now, BeginFrame is initiated by each renderer process.
> With this cl, BeginFrame is scheduled from parent(browser) cc scheduler
> to child(renderer) cc scheduler.
> For more detailed information, please see this (http://goo.gl/D1Qxrr)
>
> Also, --enable-begin-frame-scheduling is no longer needed because all platform except Mac
> uses it as a default.
>
> R=brianderson@chromium.org, danakj@chromium.org, mithro@mithis.com
> BUG=372086
>
> Committed: https://crrev.com/17dd2f109f3155ebf183627b63df25f97f34b67f
> Cr-Commit-Position: refs/heads/master@{#322622}

TBR=brianderson@chromium.org,mithro@mithis.com,sievers@chromium.org,oshima@chromium.org,boliu@chromium.org,simonhong@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=372086
Committed: https://crrev.com/8feb5893fe7d81b244011f848b24b671b0b0cf45
Cr-Commit-Position: refs/heads/master@{#322648}

[danakj, 2015-03-27 21:40:33]

Created Revert of Enable BeginFrame scheduling on aura

[commit-bot: I haz the power, 2015-03-27 21:40:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1040813002/1

[commit-bot: I haz the power, 2015-03-27 21:42:05]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-27 21:42:58]

Patchset 1 (id:??) landed as
https://crrev.com/8feb5893fe7d81b244011f848b24b671b0b0cf45
Cr-Commit-Position: refs/heads/master@{#322648}