Ozone DRM: Destroy MusThreadProxy last.

Ozone DRM: Destroy MusThreadProxy last.

A raw pointer MusThreadProxy is held by DrmOverlayManager and
DrmDisplayHostManager but MusThreadProxy was being destroyed first. This
caused crashes on log out when either of classes tried to access
MusThreadProxy in their destructors.

Make sure MusThreadProxy is destroyed last. Also fix an issue where
DrmDisplayHostManager doesn't unregister itself as a GpuThreadObserver.

BUG=714722
Review-Url: https://codereview.chromium.org/2844023002
Cr-Commit-Position: refs/heads/master@{#467430}
Committed: https://chromium.googlesource.com/chromium/src/+/28a190c328089bf845181da368f16013108381b5

[kylechar, 2017-04-26 18:14:49]

kylechar@chromium.org changed reviewers:
+ rjkroege@chromium.org

[kylechar, 2017-04-26 19:18:22]

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

[commit-bot: I haz the power, 2017-04-26 19:19:29]

Dry run: 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, 2017-04-26 20:04:04]

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

[commit-bot: I haz the power, 2017-04-26 20:04:05]

Dry run: This issue passed the CQ dry run.

[rjkroege, 2017-04-26 20:07:53]

lgtm

[kylechar, 2017-04-26 20:08:16]

The CQ bit was checked by kylechar@chromium.org

[commit-bot: I haz the power, 2017-04-26 20:09:23]

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, 2017-04-26 20:16:21]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493237296711670, "parent_rev":
"08c8cb99cf2c384ff69b0a608de44807c4f7bd1c", "commit_rev":
"28a190c328089bf845181da368f16013108381b5"}

[commit-bot: I haz the power, 2017-04-26 20:16:28]

Description was changed from

==========
Ozone DRM: Destroy MusThreadProxy last.

A raw pointer MusThreadProxy is held by DrmOverlayManager and
DrmDisplayHostManager but MusThreadProxy was being destroyed first. This
caused crashes on log out when either of classes tried to access
MusThreadProxy in their destructors.

Make sure MusThreadProxy is destroyed last. Also fix an issue where
DrmDisplayHostManager doesn't unregister itself as a GpuThreadObserver.

BUG=714722
==========

to

==========
Ozone DRM: Destroy MusThreadProxy last.

A raw pointer MusThreadProxy is held by DrmOverlayManager and
DrmDisplayHostManager but MusThreadProxy was being destroyed first. This
caused crashes on log out when either of classes tried to access
MusThreadProxy in their destructors.

Make sure MusThreadProxy is destroyed last. Also fix an issue where
DrmDisplayHostManager doesn't unregister itself as a GpuThreadObserver.

BUG=714722

Review-Url: https://codereview.chromium.org/2844023002
Cr-Commit-Position: refs/heads/master@{#467430}
Committed:
https://chromium.googlesource.com/chromium/src/+/28a190c328089bf845181da368f1...
==========

[commit-bot: I haz the power, 2017-04-26 20:16:31]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/28a190c328089bf845181da368f1...