[Merge to M56] X11: Reset dispatching event when nested message loop ends

[Merge to M56] X11: Reset dispatching event when nested message loop ends

> Review-Url: https://codereview.chromium.org/2568233003
> Cr-Commit-Position: refs/heads/master@{#438203}

BUG=672763
NOTRY=true
NOPRESUBMIT=true
TBR=sadrul@chromium.org

Review-Url: https://codereview.chromium.org/2575563002

[Tom Anderson, 2016-12-13 18:42:49]

The CQ bit was checked by thomasanderson@chromium.org

[commit-bot: I haz the power, 2016-12-13 18:43:31]

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, 2016-12-13 18:47:36]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1481654569144530, "parent_rev":
"ccb2be0f90bc4b6340d8e0bd1b269b8be5a6a775", "commit_rev":
"386d7cafb37c04b4364a0e4ec4cb008e443e0d95"}

[commit-bot: I haz the power, 2016-12-13 18:48:01]

Description was changed from

==========
[Merge to M56] X11: Reset dispatching event when nested message loop ends

> Review-Url: https://codereview.chromium.org/2568233003
> Cr-Commit-Position: refs/heads/master@{#438203}

BUG=672763
NOTRY=true
NOPRESUBMIT=true
TBR=sadrul@chromium.org
==========

to

==========
[Merge to M56] X11: Reset dispatching event when nested message loop ends

> Review-Url: https://codereview.chromium.org/2568233003
> Cr-Commit-Position: refs/heads/master@{#438203}

BUG=672763
NOTRY=true
NOPRESUBMIT=true
TBR=sadrul@chromium.org

Review-Url: https://codereview.chromium.org/2575563002
==========

[commit-bot: I haz the power, 2016-12-13 18:48:02]

Committed patchset #1 (id:1)