Revert of Check DisplayItemCient aliveness in cached subsequences

Revert of Check DisplayItemCient aliveness in cached subsequences (patchset #6 id:100001 of https://codereview.chromium.org/2066603005/ )

Reason for revert:
Based on r400605 that is to be reverted.

Original issue's description:
> Check DisplayItemCient aliveness in cached subsequences
> 
> BUG=609218
> 
> Committed: https://crrev.com/127e5fadca5f431a5de1bef939f7f43aec1d136f
> Cr-Commit-Position: refs/heads/master@{#400607}

TBR=chrishtr@chromium.org,wangxianzhu@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=609218
Committed: https://chromium.googlesource.com/chromium/src/+/6ece4aaeb5e2c53eca2617d42de64ff917cee884

[vasilii, 2016-06-20 10:02:44]

The CQ bit was checked by vasilii@chromium.org

[vasilii, 2016-06-20 10:02:44]

Created Revert of Check DisplayItemCient aliveness in cached subsequences

[commit-bot: I haz the power, 2016-06-20 10:02:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2078393003/1

[commit-bot: I haz the power, 2016-06-20 10:33:04]

Description was changed from

==========
Revert of Check DisplayItemCient aliveness in cached subsequences (patchset #6
id:100001 of https://codereview.chromium.org/2066603005/ )

Reason for revert:
Based on r400605 that is to be reverted.

Original issue's description:
> Check DisplayItemCient aliveness in cached subsequences
> 
> BUG=609218
> 
> Committed: https://crrev.com/127e5fadca5f431a5de1bef939f7f43aec1d136f
> Cr-Commit-Position: refs/heads/master@{#400607}

TBR=chrishtr@chromium.org,wangxianzhu@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=609218
==========

to

==========
Revert of Check DisplayItemCient aliveness in cached subsequences (patchset #6
id:100001 of https://codereview.chromium.org/2066603005/ )

Reason for revert:
Based on r400605 that is to be reverted.

Original issue's description:
> Check DisplayItemCient aliveness in cached subsequences
>
> BUG=609218
>
> Committed: https://crrev.com/127e5fadca5f431a5de1bef939f7f43aec1d136f
> Cr-Commit-Position: refs/heads/master@{#400607}

TBR=chrishtr@chromium.org,wangxianzhu@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=609218

Committed: https://crrev.com/6ece4aaeb5e2c53eca2617d42de64ff917cee884
Cr-Commit-Position: refs/heads/master@{#400644}
==========

[commit-bot: I haz the power, 2016-06-20 10:33:06]

Patchset 1 (id:??) landed as
https://crrev.com/6ece4aaeb5e2c53eca2617d42de64ff917cee884
Cr-Commit-Position: refs/heads/master@{#400644}

[vasilii, 2016-06-20 10:33:52]

Description was changed from

==========
Revert of Check DisplayItemCient aliveness in cached subsequences (patchset #6
id:100001 of https://codereview.chromium.org/2066603005/ )

Reason for revert:
Based on r400605 that is to be reverted.

Original issue's description:
> Check DisplayItemCient aliveness in cached subsequences
>
> BUG=609218
>
> Committed: https://crrev.com/127e5fadca5f431a5de1bef939f7f43aec1d136f
> Cr-Commit-Position: refs/heads/master@{#400607}

TBR=chrishtr@chromium.org,wangxianzhu@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=609218

Committed: https://crrev.com/6ece4aaeb5e2c53eca2617d42de64ff917cee884
Cr-Commit-Position: refs/heads/master@{#400644}
==========

to

==========
Revert of Check DisplayItemCient aliveness in cached subsequences (patchset #6
id:100001 of https://codereview.chromium.org/2066603005/ )

Reason for revert:
Based on r400605 that is to be reverted.

Original issue's description:
> Check DisplayItemCient aliveness in cached subsequences
> 
> BUG=609218
> 
> Committed: https://crrev.com/127e5fadca5f431a5de1bef939f7f43aec1d136f
> Cr-Commit-Position: refs/heads/master@{#400607}

TBR=chrishtr@chromium.org,wangxianzhu@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=609218

Committed:
https://chromium.googlesource.com/chromium/src/+/6ece4aaeb5e2c53eca2617d42de6...
==========

[vasilii, 2016-06-20 10:33:54]

Committed patchset #1 (id:1) manually as
6ece4aaeb5e2c53eca2617d42de64ff917cee884 (presubmit successful).

[Yuta Kitamura, 2016-06-20 10:50:50]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/2082553002/ by yutak@chromium.org.

The reason for reverting is: It was not acceptable to revert the OwnPtr removal
patch just for this revert.

Relanding this to land OwnPtr commit again..