Swarming bots error out on bad devices.

Fix exceptions on logcats that can't be found.

Currently when the swarming bot cannot connect to a device to get logcats, it errors out with an exception.
Swarming tasks should continue to exectue with the remaining devices. Adding an if statement to check for the existence of device logcats to prevent
exceptions.

BUG=638051
Committed: https://crrev.com/ab7b497976d171ee4d7ceac09e994002de38407b
Cr-Commit-Position: refs/heads/master@{#412152}

[nicholaslin, 2016-08-16 00:40:53]

Description was changed from

==========
Currently when the swarming bot cannot connect to a device to get logcats, it
errors out with an exception.
This is incorrect behavior since swarming will simply shard the task to the
remaining devices and excecute
without the current device. Adding an if statement to check for the existence of
device logcats to prevent
exceptions.

BUG=638051
==========

to

==========
Currently when the swarming bot cannot connect to a device to get logcats, it
errors out with an exception.
This is incorrect behavior since swarming will simply shard the task to the
remaining devices and excecute
without the current device. Adding an if statement to check for the existence of
device logcats to prevent
exceptions.

BUG=638051
==========

[nicholaslin, 2016-08-16 01:21:31]

Description was changed from

==========
Currently when the swarming bot cannot connect to a device to get logcats, it
errors out with an exception.
This is incorrect behavior since swarming will simply shard the task to the
remaining devices and excecute
without the current device. Adding an if statement to check for the existence of
device logcats to prevent
exceptions.

BUG=638051
==========

to

==========
Currently when the swarming bot cannot connect to a device to get logcats, it
errors out with an exception.
Swarming tasks should continue to exectue with the remaining devices. Adding an
if statement to check for the existence of device logcats to prevent
exceptions.

BUG=638051
==========

[nicholaslin, 2016-08-16 01:21:52]

nicholaslin@google.com changed reviewers:
+ jbudorick@chromium.org, stip@chromium.org

[nicholaslin, 2016-08-16 01:21:52]

ptal

[jbudorick, 2016-08-16 01:32:16]

lgtm

[jbudorick, 2016-08-16 01:42:06]

On 2016/08/16 01:32:16, jbudorick wrote:
> lgtm

but your description should have a title line.

[nicholaslin, 2016-08-16 02:04:25]

Description was changed from

==========
Currently when the swarming bot cannot connect to a device to get logcats, it
errors out with an exception.
Swarming tasks should continue to exectue with the remaining devices. Adding an
if statement to check for the existence of device logcats to prevent
exceptions.

BUG=638051
==========

to

==========
Fix exceptions on logcats that can't be found.

Currently when the swarming bot cannot connect to a device to get logcats, it
errors out with an exception.
Swarming tasks should continue to exectue with the remaining devices. Adding an
if statement to check for the existence of device logcats to prevent
exceptions.

BUG=638051
==========

[nicholaslin, 2016-08-16 02:04:31]

The CQ bit was checked by nicholaslin@google.com

[commit-bot: I haz the power, 2016-08-16 02:04:48]

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, 2016-08-16 03:07:27]

Description was changed from

==========
Fix exceptions on logcats that can't be found.

Currently when the swarming bot cannot connect to a device to get logcats, it
errors out with an exception.
Swarming tasks should continue to exectue with the remaining devices. Adding an
if statement to check for the existence of device logcats to prevent
exceptions.

BUG=638051
==========

to

==========
Fix exceptions on logcats that can't be found.

Currently when the swarming bot cannot connect to a device to get logcats, it
errors out with an exception.
Swarming tasks should continue to exectue with the remaining devices. Adding an
if statement to check for the existence of device logcats to prevent
exceptions.

BUG=638051
==========

[commit-bot: I haz the power, 2016-08-16 03:07:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-16 03:10:22]

Description was changed from

==========
Fix exceptions on logcats that can't be found.

Currently when the swarming bot cannot connect to a device to get logcats, it
errors out with an exception.
Swarming tasks should continue to exectue with the remaining devices. Adding an
if statement to check for the existence of device logcats to prevent
exceptions.

BUG=638051
==========

to

==========
Fix exceptions on logcats that can't be found.

Currently when the swarming bot cannot connect to a device to get logcats, it
errors out with an exception.
Swarming tasks should continue to exectue with the remaining devices. Adding an
if statement to check for the existence of device logcats to prevent
exceptions.

BUG=638051

Committed: https://crrev.com/ab7b497976d171ee4d7ceac09e994002de38407b
Cr-Commit-Position: refs/heads/master@{#412152}
==========

[commit-bot: I haz the power, 2016-08-16 03:10:23]

Patchset 1 (id:??) landed as
https://crrev.com/ab7b497976d171ee4d7ceac09e994002de38407b
Cr-Commit-Position: refs/heads/master@{#412152}