Revert of cc: Trigger BeginImplFrameDeadline immediately when invisible.

Revert of cc: Trigger BeginImplFrameDeadline immediately when invisible. (patchset #1 id:1 of https://codereview.chromium.org/1051123002/)

Reason for revert:
Speculative revert to fix persistent WebViewTest.Shim_TestAutosizeWithPartialAttributes breakage.

See http://build.chromium.org/p/chromium.linux/builders/Linux%20Tests/builds/22760

Original issue's description:
> cc: Trigger BeginImplFrameDeadline immediately when invisible.
>
> When becoming invisible we are going to abort any pending draw / activate. We
> should do that right now rather then waking up sometime in the future and doing
> it. This increases the speed at which we become idle after going invisible.
>
> A minor side effect is we will do more work if we become invisible and then
> visible within a single frame, but this case is extremely unlikely while the
> case compared to becoming invisible for a longer period.
>
> Related to http://crrev.com/1050833002
>
> BUG=371747
> R=brianderson,jdduke

TBR=brianderson@chromium.org,jdduke@chromium.org,mithro@mithis.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=371747
Committed: https://crrev.com/fe201d68f97d395c920fe173ccdb9189936acc76
Cr-Commit-Position: refs/heads/master@{#323545}

[tommycli, 2015-04-02 18:44:40]

Created Revert of cc: Trigger BeginImplFrameDeadline immediately when invisible.

[commit-bot: I haz the power, 2015-04-02 18:45:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1058983002/1

[commit-bot: I haz the power, 2015-04-02 18:52:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-03 20:28:17]

Patchset 1 (id:??) landed as
https://crrev.com/fe201d68f97d395c920fe173ccdb9189936acc76
Cr-Commit-Position: refs/heads/master@{#323545}