Add debug logging to auth.py.

Add debug logging to auth.py.

There are some mysterious issues happening to some Windows users. Verbose log
can be helpful.

R=maruel@chromium.org
BUG=356813
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=294910

[Vadim Sh., 2015-04-20 23:53:29]

ptal

[nodir, 2015-04-21 00:01:11]

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

[nodir, 2015-04-21 00:01:12]

https://codereview.chromium.org/1051143004/diff/1/auth.py
File auth.py (right):

https://codereview.chromium.org/1051143004/diff/1/auth.py#newcode537
auth.py:537: logging.debug('No %s', title)
I think there is only one case that (not credentials). I'd move this line there,
because "No %s" is odd in other cases

https://codereview.chromium.org/1051143004/diff/1/auth.py#newcode543
auth.py:543: 'now': datetime.datetime.utcnow(),
Please say utcnow

[Vadim Sh., 2015-04-21 00:04:21]

https://codereview.chromium.org/1051143004/diff/1/auth.py
File auth.py (right):

https://codereview.chromium.org/1051143004/diff/1/auth.py#newcode537
auth.py:537: logging.debug('No %s', title)
On 2015/04/21 00:01:11, nodir wrote:
> I think there is only one case that (not credentials). I'd move this line
there,
> because "No %s" is odd in other cases

Done. Though I still prefer to be defensive and check that credentials != None.

https://codereview.chromium.org/1051143004/diff/1/auth.py#newcode543
auth.py:543: 'now': datetime.datetime.utcnow(),
On 2015/04/21 00:01:12, nodir wrote:
> Please say utcnow

Done.

[nodir, 2015-04-21 00:07:30]

I meant to assert credentials are not None, but this lgtm

[Vadim Sh., 2015-04-21 00:08:41]

The CQ bit was checked by vadimsh@chromium.org

[commit-bot: I haz the power, 2015-04-21 00:08:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1051143004/20001

[commit-bot: I haz the power, 2015-04-21 00:12:39]

Committed patchset #2 (id:20001) as
http://src.chromium.org/viewvc/chrome?view=rev&revision=294910