Revert of Don't pixel-snap overflow clips in clip paint property nodes.

Revert of Don't pixel-snap overflow clips in clip paint property nodes. (patchset #5 id:80001 of https://codereview.chromium.org/2701523003/ )

Reason for revert:
Failing layout test on Mac:
paint/invalidation/select-option-background-color.html

BUG=693345
Original issue's description:
> Don't pixel-snap overflow clips in clip paint property nodes.
> 
> Pixel-snapping should be applied at "paint" time instead, based on context
> which includes subpixel accumulation.
> 
> Also, adds code to apply subpixel accumulation for overflow clip rects applied
> to background clip rects.
> 
> BUG=691959
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
> 
> Review-Url: https://codereview.chromium.org/2701523003
> Cr-Commit-Position: refs/heads/master@{#451189}
> Committed: https://chromium.googlesource.com/chromium/src/+/19b6d116165378bc06ae204d74b5b1da58caa9ab

TBR=wangxianzhu@chromium.org,chrishtr@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=691959

[Matt Giuca, 2017-02-17 04:00:15]

The CQ bit was checked by mgiuca@chromium.org

[Matt Giuca, 2017-02-17 04:00:16]

Created Revert of Don't pixel-snap overflow clips in clip paint property nodes.

[commit-bot: I haz the power, 2017-02-17 04:01:03]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Xianzhu, 2017-02-17 04:01:57]

The CQ bit was unchecked by wangxianzhu@chromium.org

[Xianzhu, 2017-02-17 04:02:31]

On 2017/02/17 04:01:03, commit-bot: I haz the power wrote:
> CQ is trying da patch. Follow status at
>  
>
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

A while please. Let me check the reason of the failure. Perhaps we just need a
rebaseline.

[Matt Giuca, 2017-02-17 04:03:49]

On 2017/02/17 04:02:31, Xianzhu wrote:
> On 2017/02/17 04:01:03, commit-bot: I haz the power wrote:
> > CQ is trying da patch. Follow status at
> >  
> >
>
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...
> 
> A while please. Let me check the reason of the failure. Perhaps we just need a
> rebaseline.

OK, but please address this within 30 minutes or so; otherwise I will revert and
then you can take your time and reland.

[Xianzhu, 2017-02-17 04:16:13]

On 2017/02/17 04:03:49, Matt Giuca wrote:
> On 2017/02/17 04:02:31, Xianzhu wrote:
> > On 2017/02/17 04:01:03, commit-bot: I haz the power wrote:
> > > CQ is trying da patch. Follow status at
> > >  
> > >
> >
>
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...
> > 
> > A while please. Let me check the reason of the failure. Perhaps we just need
a
> > rebaseline.
> 
> OK, but please address this within 30 minutes or so; otherwise I will revert
and
> then you can take your time and reland.

Thanks. Closing this revert in favor of
https://codereview.chromium.org/2694623015.