exo: Fix multi-display cursor crash

exo: Fix multi-display cursor crash

The cursor surface is parented to the primary root window, which may
change when using multiple displays. This CL fixes a crash caused by
removing the child from the primary root window when the parent is a
different root window or the child is orphaned.

BUG=714832
TEST=No crashes after changing primary display.

Review-Url: https://codereview.chromium.org/2862953002
Cr-Commit-Position: refs/heads/master@{#469543}
Committed: https://chromium.googlesource.com/chromium/src/+/8d03afaa6214f583f526587f3865b4ccad45cad3

[Dominik Laskowski, 2017-05-04 21:10:24]

domlaskowski@chromium.org changed reviewers:
+ reveman@chromium.org

[Dominik Laskowski, 2017-05-04 21:10:25]

PTAL.

[reveman, 2017-05-04 21:12:09]

lgtm

[Dominik Laskowski, 2017-05-04 23:40:33]

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

[commit-bot: I haz the power, 2017-05-04 23:41:23]

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, 2017-05-05 00:13:25]

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

[commit-bot: I haz the power, 2017-05-05 00:13:27]

Dry run: This issue passed the CQ dry run.

[Dominik Laskowski, 2017-05-05 00:21:01]

The CQ bit was checked by domlaskowski@chromium.org

[commit-bot: I haz the power, 2017-05-05 00:21:40]

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, 2017-05-05 00:27:06]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493943661468630, "parent_rev":
"2148f56018f190368c84a7562cb048e5e0a0e4f5", "commit_rev":
"8d03afaa6214f583f526587f3865b4ccad45cad3"}

[commit-bot: I haz the power, 2017-05-05 00:27:59]

Description was changed from

==========
exo: Fix multi-display cursor crash

The cursor surface is parented to the primary root window, which may
change when using multiple displays. This CL fixes a crash caused by
removing the child from the primary root window when the parent is a
different root window or the child is orphaned.

BUG=714832
TEST=No crashes after changing primary display.
==========

to

==========
exo: Fix multi-display cursor crash

The cursor surface is parented to the primary root window, which may
change when using multiple displays. This CL fixes a crash caused by
removing the child from the primary root window when the parent is a
different root window or the child is orphaned.

BUG=714832
TEST=No crashes after changing primary display.

Review-Url: https://codereview.chromium.org/2862953002
Cr-Commit-Position: refs/heads/master@{#469543}
Committed:
https://chromium.googlesource.com/chromium/src/+/8d03afaa6214f583f526587f3865...
==========

[commit-bot: I haz the power, 2017-05-05 00:28:02]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/8d03afaa6214f583f526587f3865...