Remove unused linked_ptr include in extension.h

Remove unused linked_ptr include in extension.h

Seems BackgroundModeData was depending on it transitively, add explicit
include there instead.

BUG=556939
Test=None

Committed: https://crrev.com/8374a2aa576bd914fb2ebcf61b886ac88d129557
Cr-Commit-Position: refs/heads/master@{#434512}

[lazyboy, 2016-11-12 03:52:49]

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

[commit-bot: I haz the power, 2016-11-12 03:53:00]

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

[lazyboy, 2016-11-12 03:53:09]

lazyboy@chromium.org changed reviewers:
+ atwilson@chromium.org

[lazyboy, 2016-11-12 03:54:25]

Description was changed from

==========
Remove unused linked_ptr include in extension.h

Seems BackgroundModeData was depending on it transitively, add explicit
include there instead.

BUG=None
Test=None
==========

to

==========
Remove unused linked_ptr include in extension.h

Seems BackgroundModeData was depending on it transitively, add explicit
include there instead.

BUG=556939
Test=None
==========

[commit-bot: I haz the power, 2016-11-12 04:43:38]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-11-12 04:43:39]

Dry run: This issue passed the CQ dry run.

[Andrew T Wilson (Slow), 2016-11-25 14:50:57]

lgtm

[Andrew T Wilson (Slow), 2016-11-25 14:51:02]

The CQ bit was checked by atwilson@chromium.org

[commit-bot: I haz the power, 2016-11-25 14:51:16]

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, 2016-11-25 15:59:31]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1480085462879730, "parent_rev":
"2d9db450918bcc7e56b63e9696b05f1c36fa6cb7", "commit_rev":
"acadb3bd5efea819b0205fcee54f75d8b53c3b7f"}

[commit-bot: I haz the power, 2016-11-25 15:59:57]

Description was changed from

==========
Remove unused linked_ptr include in extension.h

Seems BackgroundModeData was depending on it transitively, add explicit
include there instead.

BUG=556939
Test=None
==========

to

==========
Remove unused linked_ptr include in extension.h

Seems BackgroundModeData was depending on it transitively, add explicit
include there instead.

BUG=556939
Test=None
==========

[commit-bot: I haz the power, 2016-11-25 15:59:58]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-25 16:02:00]

Description was changed from

==========
Remove unused linked_ptr include in extension.h

Seems BackgroundModeData was depending on it transitively, add explicit
include there instead.

BUG=556939
Test=None
==========

to

==========
Remove unused linked_ptr include in extension.h

Seems BackgroundModeData was depending on it transitively, add explicit
include there instead.

BUG=556939
Test=None

Committed: https://crrev.com/8374a2aa576bd914fb2ebcf61b886ac88d129557
Cr-Commit-Position: refs/heads/master@{#434512}
==========

[commit-bot: I haz the power, 2016-11-25 16:02:01]

Patchset 1 (id:??) landed as
https://crrev.com/8374a2aa576bd914fb2ebcf61b886ac88d129557
Cr-Commit-Position: refs/heads/master@{#434512}