xvfb: improve robustness when stale lock files exist

xvfb: improve robustness when stale lock files exist

This ports https://codereview.chromium.org/2153083002
to src-side xvfb.py .

BUG=630698, 628517
Committed: https://crrev.com/5916a6410762e178bee821135bc5e1059c77cab9
Cr-Commit-Position: refs/heads/master@{#409767}

[Paweł Hajdan Jr., 2016-08-04 09:00:43]

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

[commit-bot: I haz the power, 2016-08-04 09:01:00]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Paweł Hajdan Jr., 2016-08-04 09:28:16]

phajdan.jr@chromium.org changed reviewers:
+ emso@chromium.org, sergiyb@chromium.org, tandrii@chromium.org

[Sergiy Byelozyorov, 2016-08-04 09:33:50]

lgtm

[commit-bot: I haz the power, 2016-08-04 10:13:06]

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

[commit-bot: I haz the power, 2016-08-04 10:13:07]

Dry run: This issue passed the CQ dry run.

[Paweł Hajdan Jr., 2016-08-04 12:44:33]

The CQ bit was checked by phajdan.jr@chromium.org

[commit-bot: I haz the power, 2016-08-04 12:44:58]

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, 2016-08-04 12:48:05]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-04 12:49:49]

Description was changed from

==========
xvfb: improve robustness when stale lock files exist

This ports https://codereview.chromium.org/2153083002
to src-side xvfb.py .

BUG=630698, 628517
==========

to

==========
xvfb: improve robustness when stale lock files exist

This ports https://codereview.chromium.org/2153083002
to src-side xvfb.py .

BUG=630698, 628517

Committed: https://crrev.com/5916a6410762e178bee821135bc5e1059c77cab9
Cr-Commit-Position: refs/heads/master@{#409767}
==========

[commit-bot: I haz the power, 2016-08-04 12:49:50]

Patchset 1 (id:??) landed as
https://crrev.com/5916a6410762e178bee821135bc5e1059c77cab9
Cr-Commit-Position: refs/heads/master@{#409767}