Android: Explicitly tear down LayerTreeHost first, take 2

Android: Explicitly tear down LayerTreeHost first, take 2

In particiular, there might be CompositorImpl::VSyncObservers
that are indirectly owned by LTH, so make sure those go away
before the ObserverList.

TBR=brianderson@chromium.org
BUG=571030, 571148
Committed: https://crrev.com/1a9f503ebfef2f89531eccb435e0b27f4bd101f1
Cr-Commit-Position: refs/heads/master@{#367703}

[no sievers, 2016-01-05 22:56:11]

The CQ bit was checked by sievers@chromium.org

[commit-bot: I haz the power, 2016-01-05 22:56:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1560533004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1560533004/1

[commit-bot: I haz the power, 2016-01-05 23:56:04]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-01-05 23:56:45]

Description was changed from

==========
Android: Explicitly tear down LayerTreeHost first, take 2

In particiular, there might be CompositorImpl::VSyncObservers
that are indirectly owned by LTH, so make sure those go away
before the ObserverList.

TBR=brianderson@chromium.org
BUG=571030,571148
==========

to

==========
Android: Explicitly tear down LayerTreeHost first, take 2

In particiular, there might be CompositorImpl::VSyncObservers
that are indirectly owned by LTH, so make sure those go away
before the ObserverList.

TBR=brianderson@chromium.org
BUG=571030,571148

Committed: https://crrev.com/1a9f503ebfef2f89531eccb435e0b27f4bd101f1
Cr-Commit-Position: refs/heads/master@{#367703}
==========

[commit-bot: I haz the power, 2016-01-05 23:56:46]

Patchset 1 (id:??) landed as
https://crrev.com/1a9f503ebfef2f89531eccb435e0b27f4bd101f1
Cr-Commit-Position: refs/heads/master@{#367703}