Add presubmit check to warn against using NULL

Add presubmit check to warn against using NULL

BUG=704361
R=dpranke@chromium.org

Review-Url: https://codereview.chromium.org/2765423003
Cr-Commit-Position: refs/heads/master@{#460485}
Committed: https://chromium.googlesource.com/chromium/src/+/e7caaa9b45386f0061c6d5e33ec893a951b12c5b

[Tom (Use chromium acct), 2017-03-23 19:24:34]

dpranke@ ptal

[Tom (Use chromium acct), 2017-03-28 19:26:14]

thomasanderson@google.com changed reviewers:
+ thakis@chromium.org
- dpranke@chromium.org

[Tom (Use chromium acct), 2017-03-28 19:26:14]

-dpranke
+thakis can you look at this one too

[Tom (Use chromium acct), 2017-03-28 19:26:28]

The CQ bit was checked by thomasanderson@google.com to run a CQ dry run

[commit-bot: I haz the power, 2017-03-28 19:26:55]

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

[Nico, 2017-03-28 19:27:42]

I'm not a PRESUBMIT OWNER.

[Tom (Use chromium acct), 2017-03-28 19:33:09]

thomasanderson@google.com changed reviewers:
+ phajdan.jr@chromium.org
- thakis@chromium.org

[Tom (Use chromium acct), 2017-03-28 19:33:09]

-thakis
+phajdan ptal

[commit-bot: I haz the power, 2017-03-28 19:56:49]

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

[commit-bot: I haz the power, 2017-03-28 19:56:50]

Dry run: This issue passed the CQ dry run.

[Paweł Hajdan Jr., 2017-03-29 19:00:07]

LGTM

[Tom (Use chromium acct), 2017-03-29 19:03:07]

The CQ bit was checked by thomasanderson@google.com

[commit-bot: I haz the power, 2017-03-29 19:04:04]

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, 2017-03-29 19:23:00]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1490814187937080, "parent_rev":
"20b661f1dffc812e1432ce1d506cc367ad5c24eb", "commit_rev":
"e7caaa9b45386f0061c6d5e33ec893a951b12c5b"}

[commit-bot: I haz the power, 2017-03-29 19:23:52]

Description was changed from

==========
Add presubmit check to warn against using NULL

BUG=704361
R=dpranke@chromium.org
==========

to

==========
Add presubmit check to warn against using NULL

BUG=704361
R=dpranke@chromium.org

Review-Url: https://codereview.chromium.org/2765423003
Cr-Commit-Position: refs/heads/master@{#460485}
Committed:
https://chromium.googlesource.com/chromium/src/+/e7caaa9b45386f0061c6d5e33ec8...
==========

[commit-bot: I haz the power, 2017-03-29 19:23:53]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/e7caaa9b45386f0061c6d5e33ec8...