Revert of Don't traverse non-stacked layer under composited child in traverseNonCompositingDescendants

Revert of Don't traverse non-stacked layer under composited child in traverseNonCompositingDescendants (patchset #5 id:80001 of https://codereview.chromium.org/2214253002/ )

Reason for revert:
Reverting this CL because it appears to be breaking the following bot: https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Mac%20Builder%20%28dbg%29/builds/164802

Original issue's description:
> Don't traverse non-stacked layer under composited child in traverseNonCompositingDescendants
>
> Non-stacked layers under a composited object belong to the object, so
> we should not traverse them in traverseNonCompositingDescendants.
>
> BUG=634389
> TEST=LayoutObjectTest.TraverseNonCompositingDescendantsInPaintOrder
> TBR=nednguyen (for enabling the system health smoke test)
>
> Committed: https://crrev.com/6f716f1637685a30fd65cdec3a6b130690d56dbf
> Cr-Commit-Position: refs/heads/master@{#410070}

TBR=chrishtr@chromium.org,trchen@chromium.org,wangxianzhu@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=634389
Committed: https://crrev.com/2a98b93fe02a0d09bf32e9ffb96879ba63b08634
Cr-Commit-Position: refs/heads/master@{#410073}

[anthonyvd, 2016-08-05 16:12:33]

The CQ bit was checked by anthonyvd@chromium.org

[anthonyvd, 2016-08-05 16:12:33]

Created Revert of Don't traverse non-stacked layer under composited child in
traverseNonCompositingDescendants

[commit-bot: I haz the power, 2016-08-05 16:14:55]

Description was changed from

==========
Revert of Don't traverse non-stacked layer under composited child in
traverseNonCompositingDescendants (patchset #5 id:80001 of
https://codereview.chromium.org/2214253002/ )

Reason for revert:
Reverting this CL because it appears to be breaking the following bot:
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Mac%20Builder%...

Original issue's description:
> Don't traverse non-stacked layer under composited child in
traverseNonCompositingDescendants
> 
> Non-stacked layers under a composited object belong to the object, so
> we should not traverse them in traverseNonCompositingDescendants.
> 
> BUG=634389
> TEST=LayoutObjectTest.TraverseNonCompositingDescendantsInPaintOrder
> TBR=nednguyen (for enabling the system health smoke test)
> 
> Committed: https://crrev.com/6f716f1637685a30fd65cdec3a6b130690d56dbf
> Cr-Commit-Position: refs/heads/master@{#410070}

TBR=chrishtr@chromium.org,trchen@chromium.org,wangxianzhu@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=634389
==========

to

==========
Revert of Don't traverse non-stacked layer under composited child in
traverseNonCompositingDescendants (patchset #5 id:80001 of
https://codereview.chromium.org/2214253002/ )

Reason for revert:
Reverting this CL because it appears to be breaking the following bot:
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Mac%20Builder%...

Original issue's description:
> Don't traverse non-stacked layer under composited child in
traverseNonCompositingDescendants
>
> Non-stacked layers under a composited object belong to the object, so
> we should not traverse them in traverseNonCompositingDescendants.
>
> BUG=634389
> TEST=LayoutObjectTest.TraverseNonCompositingDescendantsInPaintOrder
> TBR=nednguyen (for enabling the system health smoke test)
>
> Committed: https://crrev.com/6f716f1637685a30fd65cdec3a6b130690d56dbf
> Cr-Commit-Position: refs/heads/master@{#410070}

TBR=chrishtr@chromium.org,trchen@chromium.org,wangxianzhu@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=634389

Committed: https://crrev.com/2a98b93fe02a0d09bf32e9ffb96879ba63b08634
Cr-Commit-Position: refs/heads/master@{#410073}
==========

[Xianzhu, 2016-08-05 16:17:20]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/2219913002/ by wangxianzhu@chromium.org.

The reason for reverting is: Fix conflict..