[Sync] Don't call start_callback_ if null in SMTP.

[Sync] Don't call start_callback_ if null in SMTP.

Still lost as to why it would be null, but this should stop crashes.

BUG=679657, 673883
Review-Url: https://codereview.chromium.org/2622223003
Cr-Commit-Position: refs/heads/master@{#442978}
Committed: https://chromium.googlesource.com/chromium/src/+/cd717e257a1933d2f8ee61850407db7332093e6a

[maxbogue, 2017-01-11 17:44:50]

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

[commit-bot: I haz the power, 2017-01-11 17:45:07]

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

[maxbogue, 2017-01-11 19:01:46]

Description was changed from

==========
[Sync] Don't call start_callback_ if null in SMTP.

Still lost as to why it would be null, but this should stop crashes.

BUG=679657
==========

to

==========
[Sync] Don't call start_callback_ if null in SMTP.

Still lost as to why it would be null, but this should stop crashes.

BUG=679657,673883
==========

[maxbogue, 2017-01-11 19:01:59]

maxbogue@chromium.org changed reviewers:
+ skym@chromium.org

[maxbogue, 2017-01-11 19:01:59]

Sky, PTAL

[skym, 2017-01-11 19:02:12]

lgtm

[commit-bot: I haz the power, 2017-01-11 19:04:50]

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

[commit-bot: I haz the power, 2017-01-11 19:04:51]

Dry run: This issue passed the CQ dry run.

[maxbogue, 2017-01-11 19:14:16]

The CQ bit was checked by maxbogue@chromium.org

[commit-bot: I haz the power, 2017-01-11 19:15:05]

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, 2017-01-11 19:28:24]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1484162056111260, "parent_rev":
"302d9ac35bbd6fa65f9364388c1fb381ae58060a", "commit_rev":
"cd717e257a1933d2f8ee61850407db7332093e6a"}

[commit-bot: I haz the power, 2017-01-11 19:28:53]

Description was changed from

==========
[Sync] Don't call start_callback_ if null in SMTP.

Still lost as to why it would be null, but this should stop crashes.

BUG=679657,673883
==========

to

==========
[Sync] Don't call start_callback_ if null in SMTP.

Still lost as to why it would be null, but this should stop crashes.

BUG=679657,673883

Review-Url: https://codereview.chromium.org/2622223003
Cr-Commit-Position: refs/heads/master@{#442978}
Committed:
https://chromium.googlesource.com/chromium/src/+/cd717e257a1933d2f8ee61850407...
==========

[commit-bot: I haz the power, 2017-01-11 19:28:53]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/cd717e257a1933d2f8ee61850407...