Revert of Add support for flattening in GeometryMapper.

Revert of Add support for flattening in GeometryMapper. (patchset #10 id:170001 of https://codereview.chromium.org/2744743003/ )

Reason for revert:
1 test failed on Windows 7
VisualRectMappingTest.ShouldAccountForPreserve3dNested 
:
https://uberchromegw.corp.google.com/i/chromium.webkit/builders/WebKit%20Win%20x64%20Builder/builds/109634

Original issue's description:
> Add support for flattening in GeometryMapper.
> 
> Previously we assumed all matrices were preserve-3d, except flattening at the end.
> This worked because we never used GeometryMapper in situations that have any 3D.
> 
> In adding tests, fixed what seems to be a bug in LayoutBox::mapToVisualRectInAncestor
> space, in which it would skip flattening if either the local style or container
> style was preseve-3d. The correct behavior is just container.
> 
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
> 
> Review-Url: https://codereview.chromium.org/2744743003
> Cr-Commit-Position: refs/heads/master@{#456281}
> Committed: https://chromium.googlesource.com/chromium/src/+/60792c5afb8cb1eb84db0a874c95286e529eb850

TBR=trchen@chromium.org,chrishtr@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.

Review-Url: https://codereview.chromium.org/2749493003
Cr-Commit-Position: refs/heads/master@{#456347}
Committed: https://chromium.googlesource.com/chromium/src/+/cbda4b6569e36fa05fcb2fa678af03b424fd3cc0

[yoichio, 2017-03-13 07:44:23]

The CQ bit was checked by yoichio@chromium.org

[yoichio, 2017-03-13 07:44:23]

Created Revert of Add support for flattening in GeometryMapper.

[commit-bot: I haz the power, 2017-03-13 07:44:36]

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, 2017-03-13 09:57:13]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1489391063453490, "parent_rev":
"9b736431a3142a195239eb8b1a6c377fbe150584", "commit_rev":
"cbda4b6569e36fa05fcb2fa678af03b424fd3cc0"}

[commit-bot: I haz the power, 2017-03-13 09:57:48]

Description was changed from

==========
Revert of Add support for flattening in GeometryMapper. (patchset #10 id:170001
of https://codereview.chromium.org/2744743003/ )

Reason for revert:
1 test failed on Windows 7
VisualRectMappingTest.ShouldAccountForPreserve3dNested 
:
https://uberchromegw.corp.google.com/i/chromium.webkit/builders/WebKit%20Win%...

Original issue's description:
> Add support for flattening in GeometryMapper.
> 
> Previously we assumed all matrices were preserve-3d, except flattening at the
end.
> This worked because we never used GeometryMapper in situations that have any
3D.
> 
> In adding tests, fixed what seems to be a bug in
LayoutBox::mapToVisualRectInAncestor
> space, in which it would skip flattening if either the local style or
container
> style was preseve-3d. The correct behavior is just container.
> 
>
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
> 
> Review-Url: https://codereview.chromium.org/2744743003
> Cr-Commit-Position: refs/heads/master@{#456281}
> Committed:
https://chromium.googlesource.com/chromium/src/+/60792c5afb8cb1eb84db0a874c95...

TBR=trchen@chromium.org,chrishtr@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
==========

to

==========
Revert of Add support for flattening in GeometryMapper. (patchset #10 id:170001
of https://codereview.chromium.org/2744743003/ )

Reason for revert:
1 test failed on Windows 7
VisualRectMappingTest.ShouldAccountForPreserve3dNested 
:
https://uberchromegw.corp.google.com/i/chromium.webkit/builders/WebKit%20Win%...

Original issue's description:
> Add support for flattening in GeometryMapper.
> 
> Previously we assumed all matrices were preserve-3d, except flattening at the
end.
> This worked because we never used GeometryMapper in situations that have any
3D.
> 
> In adding tests, fixed what seems to be a bug in
LayoutBox::mapToVisualRectInAncestor
> space, in which it would skip flattening if either the local style or
container
> style was preseve-3d. The correct behavior is just container.
> 
>
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
> 
> Review-Url: https://codereview.chromium.org/2744743003
> Cr-Commit-Position: refs/heads/master@{#456281}
> Committed:
https://chromium.googlesource.com/chromium/src/+/60792c5afb8cb1eb84db0a874c95...

TBR=trchen@chromium.org,chrishtr@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.

Review-Url: https://codereview.chromium.org/2749493003
Cr-Commit-Position: refs/heads/master@{#456347}
Committed:
https://chromium.googlesource.com/chromium/src/+/cbda4b6569e36fa05fcb2fa678af...
==========

[commit-bot: I haz the power, 2017-03-13 09:57:50]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/cbda4b6569e36fa05fcb2fa678af...