[Layout API] Use ownerLayoutItem in updateScrollCorner()

[Layout API] Use ownerLayoutItem in updateScrollCorner()

Direct access to LayoutPart is deprecated and being removed soon. The
replacement is LayoutPartItem, which routes methods through the new
block layout API. (See linked crbug for details.) This means the
ownerLayoutObject() method is also deprecated, to be replaced with
ownerLayoutItem().

There are no functional changes.

BUG=499321
TBR=eae@chromium.org

Committed: https://crrev.com/e0af7a93aa9a401af80f647766409dffeb6f95dc
Cr-Commit-Position: refs/heads/master@{#421282}

[pilgrim_google, 2016-09-27 17:15:32]

The CQ bit was checked by pilgrim@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-09-27 17:15:47]

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

[eae, 2016-09-27 17:19:21]

LGTM

[pilgrim_google, 2016-09-27 17:28:14]

The CQ bit was unchecked by pilgrim@chromium.org

[pilgrim_google, 2016-09-27 17:28:16]

The CQ bit was checked by pilgrim@chromium.org

[commit-bot: I haz the power, 2016-09-27 17:28:30]

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, 2016-09-27 18:45:22]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-27 18:48:30]

Description was changed from

==========
[Layout API] Use ownerLayoutItem in updateScrollCorner()

Direct access to LayoutPart is deprecated and being removed soon. The
replacement is LayoutPartItem, which routes methods through the new
block layout API. (See linked crbug for details.) This means the
ownerLayoutObject() method is also deprecated, to be replaced with
ownerLayoutItem().

There are no functional changes.

BUG=499321
TBR=eae@chromium.org
==========

to

==========
[Layout API] Use ownerLayoutItem in updateScrollCorner()

Direct access to LayoutPart is deprecated and being removed soon. The
replacement is LayoutPartItem, which routes methods through the new
block layout API. (See linked crbug for details.) This means the
ownerLayoutObject() method is also deprecated, to be replaced with
ownerLayoutItem().

There are no functional changes.

BUG=499321
TBR=eae@chromium.org

Committed: https://crrev.com/e0af7a93aa9a401af80f647766409dffeb6f95dc
Cr-Commit-Position: refs/heads/master@{#421282}
==========

[commit-bot: I haz the power, 2016-09-27 18:48:31]

Patchset 1 (id:??) landed as
https://crrev.com/e0af7a93aa9a401af80f647766409dffeb6f95dc
Cr-Commit-Position: refs/heads/master@{#421282}