Make DisplayLinkMac RefCountedThreadSafe

Make DisplayLinkMac RefCountedThreadSafe

DisplayLinkMac has a non-thread-safe ref count, but it's touched from
both main thread and the display link thread.

Review-Url: https://codereview.chromium.org/2684753004
Cr-Commit-Position: refs/heads/master@{#449839}
Committed: https://chromium.googlesource.com/chromium/src/+/679a1c715691098c22285146381c520972d587b0

[tzik, 2017-02-09 11:55:47]

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

[commit-bot: I haz the power, 2017-02-09 11:56:00]

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

[tzik, 2017-02-09 12:02:16]

Description was changed from

==========
Make DisplayListMac RefCountedThreadSafe
==========

to

==========
Make DisplayLinkMac RefCountedThreadSafe

DisplayLinkMac has a non-thread-safe ref count, but it's touched from
both main thread and the display link thread.
==========

[tzik, 2017-02-09 12:02:17]

tzik@chromium.org changed reviewers:
+ ccameron@chromium.org

[tzik, 2017-02-09 12:02:30]

PTAL

[commit-bot: I haz the power, 2017-02-09 12:21:02]

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

[commit-bot: I haz the power, 2017-02-09 12:21:03]

Dry run: This issue passed the CQ dry run.

[ccameron, 2017-02-10 20:11:28]

lgtm

[tzik, 2017-02-11 03:00:05]

The CQ bit was checked by tzik@chromium.org

[commit-bot: I haz the power, 2017-02-11 03:00:40]

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, 2017-02-11 03:41:50]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1486782005510680, "parent_rev":
"83ab204d13a2058652855c18fd5ac5467853c105", "commit_rev":
"679a1c715691098c22285146381c520972d587b0"}

[commit-bot: I haz the power, 2017-02-11 03:42:24]

Description was changed from

==========
Make DisplayLinkMac RefCountedThreadSafe

DisplayLinkMac has a non-thread-safe ref count, but it's touched from
both main thread and the display link thread.
==========

to

==========
Make DisplayLinkMac RefCountedThreadSafe

DisplayLinkMac has a non-thread-safe ref count, but it's touched from
both main thread and the display link thread.

Review-Url: https://codereview.chromium.org/2684753004
Cr-Commit-Position: refs/heads/master@{#449839}
Committed:
https://chromium.googlesource.com/chromium/src/+/679a1c715691098c22285146381c...
==========

[commit-bot: I haz the power, 2017-02-11 03:42:25]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/679a1c715691098c22285146381c...