Wait for display configuration to finish before suspending

Wait for display configuration to finish before suspending

If the suspend doesn't wait, the display configuration query will race with the
suspend call. It may be possible to suspend before the configuration query
finishes. That would mean that we'd be reading display configuration at
resume.

BUG=477433
Committed: https://crrev.com/9ae8bbc5b1b185a43ddc4b3f1cf82afc9f325bd8
Cr-Commit-Position: refs/heads/master@{#328612}

[dnicoara, 2015-05-06 19:06:34]

dnicoara@chromium.org changed reviewers:
+ oshima@chromium.org

[dnicoara, 2015-05-06 19:17:05]

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

[commit-bot: I haz the power, 2015-05-06 19:19:00]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1130823003/20001

[commit-bot: I haz the power, 2015-05-06 19:50:14]

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

[commit-bot: I haz the power, 2015-05-06 19:50:15]

Dry run: This issue passed the CQ dry run.

[oshima, 2015-05-06 20:25:21]

lgtm with a nit

https://codereview.chromium.org/1130823003/diff/20001/ui/display/chromeos/dis...
File ui/display/chromeos/display_configurator.h (right):

https://codereview.chromium.org/1130823003/diff/20001/ui/display/chromeos/dis...
ui/display/chromeos/display_configurator.h:227: // machines where display
configuration is slow.
nit: document |callback|.

[dnicoara, 2015-05-06 20:28:56]

https://codereview.chromium.org/1130823003/diff/20001/ui/display/chromeos/dis...
File ui/display/chromeos/display_configurator.h (right):

https://codereview.chromium.org/1130823003/diff/20001/ui/display/chromeos/dis...
ui/display/chromeos/display_configurator.h:227: // machines where display
configuration is slow.
On 2015/05/06 20:25:20, oshima wrote:
> nit: document |callback|.

Done.

[dnicoara, 2015-05-06 20:29:16]

The CQ bit was checked by dnicoara@chromium.org

[dnicoara, 2015-05-06 20:29:16]

The patchset sent to the CQ was uploaded after l-g-t-m from oshima@chromium.org
Link to the patchset: https://codereview.chromium.org/1130823003/#ps40001
(title: ".")

[commit-bot: I haz the power, 2015-05-06 20:30:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1130823003/40001

[commit-bot: I haz the power, 2015-05-06 21:07:04]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-05-06 21:08:01]

Patchset 3 (id:??) landed as
https://crrev.com/9ae8bbc5b1b185a43ddc4b3f1cf82afc9f325bd8
Cr-Commit-Position: refs/heads/master@{#328612}