Follow-up to crrev.com/583793002 -- check if goma_dir is None.

Follow-up to crrev.com/583793002 -- check if goma_dir is None.

BUG=394990
Committed: https://crrev.com/4eca61356cefcee6da31ef56bfd570442abde75e
Cr-Commit-Position: refs/heads/master@{#296312}

[qyearsley, 2014-09-23 19:17:38]

qyearsley@chromium.org changed reviewers:
+ sullivan@chromium.org

[qyearsley, 2014-09-23 19:17:39]

Looks like goma_dir might sometimes be None.

http://build.chromium.org/p/tryserver.chromium.perf/builders/win_8_perf_bisec...

[prasadv, 2014-09-23 23:07:22]

prasadv@chromium.org changed reviewers:
+ prasadv@chromium.org

[prasadv, 2014-09-23 23:07:23]

lgtm

[qyearsley, 2014-09-23 23:07:37]

The CQ bit was checked by qyearsley@chromium.org

[commit-bot: I haz the power, 2014-09-23 23:08:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/593253002/1

[commit-bot: I haz the power, 2014-09-24 00:18:49]

Committed patchset #1 (id:1) as 7ad04b8b8bd7b6e2a5dd8916f6333c86c65daf3f

[commit-bot: I haz the power, 2014-09-24 00:19:27]

Patchset 1 (id:??) landed as
https://crrev.com/4eca61356cefcee6da31ef56bfd570442abde75e
Cr-Commit-Position: refs/heads/master@{#296312}