Revert of Fix overflow:overlay scrollbar width for paint.

Revert of Fix overflow:overlay scrollbar width for paint. (patchset #6 id:100001 of https://codereview.chromium.org/2730343003/ )

Reason for revert:
A layout test gets red after this CL due to the mismatched test expectation.

The error log is:
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Mac10.11%20%28retina%29/builds/13521
fast/overflow/scroll-nested-positioned-layer-in-overflow.html


Original issue's description:
> Fix overflow:overlay scrollbar width for paint.
> 
> This CL went too far:
> 
> https://codereview.chromium.org/2725763002
> 
> Some callers to verticalScrollbarWidth -- in particular, the paint
> code -- need the old behavior, where overflow:overlay scrollbars
> are subtracted from the overflow clip rect.
> 
> BUG=697751
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
> 
> Review-Url: https://codereview.chromium.org/2730343003
> Cr-Commit-Position: refs/heads/master@{#457251}
> Committed: https://chromium.googlesource.com/chromium/src/+/7ab46eae8507137607e258543118ef8fb04984de

TBR=pdr@chromium.org,skobes@chromium.org,szager@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=697751
Review-Url: https://codereview.chromium.org/2749863006
Cr-Commit-Position: refs/heads/master@{#457322}
Committed: https://chromium.googlesource.com/chromium/src/+/939b298311ed40bf5752b47db5e7a2b2d9db3431

[tzik, 2017-03-16 02:27:57]

The CQ bit was checked by tzik@chromium.org

[tzik, 2017-03-16 02:27:57]

Created Revert of Fix overflow:overlay scrollbar width for paint.

[commit-bot: I haz the power, 2017-03-16 02:28:16]

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, 2017-03-16 02:29:28]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1489631277071210, "parent_rev":
"cf59a89caec7659dae0a166d61185f7b6cfb0bf0", "commit_rev":
"939b298311ed40bf5752b47db5e7a2b2d9db3431"}

[commit-bot: I haz the power, 2017-03-16 02:30:17]

Description was changed from

==========
Revert of Fix overflow:overlay scrollbar width for paint. (patchset #6 id:100001
of https://codereview.chromium.org/2730343003/ )

Reason for revert:
A layout test gets red after this CL due to the mismatched test expectation.

The error log is:
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Mac10.11%20%28...
fast/overflow/scroll-nested-positioned-layer-in-overflow.html


Original issue's description:
> Fix overflow:overlay scrollbar width for paint.
> 
> This CL went too far:
> 
> https://codereview.chromium.org/2725763002
> 
> Some callers to verticalScrollbarWidth -- in particular, the paint
> code -- need the old behavior, where overflow:overlay scrollbars
> are subtracted from the overflow clip rect.
> 
> BUG=697751
>
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
> 
> Review-Url: https://codereview.chromium.org/2730343003
> Cr-Commit-Position: refs/heads/master@{#457251}
> Committed:
https://chromium.googlesource.com/chromium/src/+/7ab46eae8507137607e258543118...

TBR=pdr@chromium.org,skobes@chromium.org,szager@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=697751
==========

to

==========
Revert of Fix overflow:overlay scrollbar width for paint. (patchset #6 id:100001
of https://codereview.chromium.org/2730343003/ )

Reason for revert:
A layout test gets red after this CL due to the mismatched test expectation.

The error log is:
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Mac10.11%20%28...
fast/overflow/scroll-nested-positioned-layer-in-overflow.html


Original issue's description:
> Fix overflow:overlay scrollbar width for paint.
> 
> This CL went too far:
> 
> https://codereview.chromium.org/2725763002
> 
> Some callers to verticalScrollbarWidth -- in particular, the paint
> code -- need the old behavior, where overflow:overlay scrollbars
> are subtracted from the overflow clip rect.
> 
> BUG=697751
>
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
> 
> Review-Url: https://codereview.chromium.org/2730343003
> Cr-Commit-Position: refs/heads/master@{#457251}
> Committed:
https://chromium.googlesource.com/chromium/src/+/7ab46eae8507137607e258543118...

TBR=pdr@chromium.org,skobes@chromium.org,szager@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=697751

Review-Url: https://codereview.chromium.org/2749863006
Cr-Commit-Position: refs/heads/master@{#457322}
Committed:
https://chromium.googlesource.com/chromium/src/+/939b298311ed40bf5752b47db5e7...
==========

[commit-bot: I haz the power, 2017-03-16 02:30:18]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/939b298311ed40bf5752b47db5e7...