exo: Improved implementation of child surfaces and popups.

exo: Improved implementation of child surfaces and popups.

Use transient parents instead of making child surfaces direct
children of parent widgets. The result is correct stacking
of surfaces without locking child surfaces into the parent
surface coordinate space.

The ownership of widgets has been moved to the native widget
so that destruction of transient parent is handled correctly.

This also fixes an issue with popup surface position. The
visible bounds of the child surface was not taken into
account correctly.

BUG=549781
TEST=exo_unittests

Committed: https://crrev.com/d4372178c9652339528e915d83139d50cdd1de24
Cr-Commit-Position: refs/heads/master@{#382491}

[reveman, 2016-03-22 01:00:48]

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

[Daniele Castagna, 2016-03-22 01:26:48]

lgtm

[Daniele Castagna, 2016-03-22 01:27:26]

The CQ bit was checked by dcastagna@chromium.org

[commit-bot: I haz the power, 2016-03-22 01:27:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1819273002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1819273002/1

[commit-bot: I haz the power, 2016-03-22 01:50:33]

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

[commit-bot: I haz the power, 2016-03-22 01:50:34]

Try jobs failed on following builders:
  linux_chromium_gn_chromeos_rel on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[reveman, 2016-03-22 01:58:07]

The CQ bit was checked by reveman@chromium.org

[reveman, 2016-03-22 01:58:07]

The patchset sent to the CQ was uploaded after l-g-t-m from
dcastagna@chromium.org
Link to the patchset: https://codereview.chromium.org/1819273002/#ps20001
(title: "fix deps")

[commit-bot: I haz the power, 2016-03-22 01:58:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1819273002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1819273002/20001

[commit-bot: I haz the power, 2016-03-22 03:11:02]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-03-22 03:13:03]

Description was changed from

==========
exo: Improved implementation of child surfaces and popups.

Use transient parents instead of making child surfaces direct
children of parent widgets. The result is correct stacking
of surfaces without locking child surfaces into the parent
surface coordinate space.

The ownership of widgets has been moved to the native widget
so that destruction of transient parent is handled correctly.

This also fixes an issue with popup surface position. The
visible bounds of the child surface was not taken into
account correctly.

BUG=549781
TEST=exo_unittests
==========

to

==========
exo: Improved implementation of child surfaces and popups.

Use transient parents instead of making child surfaces direct
children of parent widgets. The result is correct stacking
of surfaces without locking child surfaces into the parent
surface coordinate space.

The ownership of widgets has been moved to the native widget
so that destruction of transient parent is handled correctly.

This also fixes an issue with popup surface position. The
visible bounds of the child surface was not taken into
account correctly.

BUG=549781
TEST=exo_unittests

Committed: https://crrev.com/d4372178c9652339528e915d83139d50cdd1de24
Cr-Commit-Position: refs/heads/master@{#382491}
==========

[commit-bot: I haz the power, 2016-03-22 03:13:04]

Patchset 2 (id:??) landed as
https://crrev.com/d4372178c9652339528e915d83139d50cdd1de24
Cr-Commit-Position: refs/heads/master@{#382491}