Pass empty email & password to ReadOnlyRietveld in dry run of commit queue

Pass empty email & password to ReadOnlyRietveld in dry run of commit queue

This avoids requiring real Rietveld credentials or specifying empty
user name on the command line (which is counterintuitive).

It also additionally ensures that nothing on Rietveld will change, even if there is a bug in ReadOnlyRietveld wrapper.

BUG=none

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=246483

[Sergey Berezin, 2014-01-23 01:16:58]

Hi Pawel, please review

[Paweł Hajdan Jr., 2014-01-23 01:26:08]

LGTM (please note my preferred @chromium.org address - it confusingly has ".jr"
in it)

https://codereview.chromium.org/145173004/diff/1/commit_queue.py
File commit_queue.py (right):

https://codereview.chromium.org/145173004/diff/1/commit_queue.py#newcode229
commit_queue.py:229: # guarantees rietveld will not allow any changes
nit: Add dot at the end of sentence.

[Sergey Berezin, 2014-01-23 02:00:02]

https://codereview.chromium.org/145173004/diff/1/commit_queue.py
File commit_queue.py (right):

https://codereview.chromium.org/145173004/diff/1/commit_queue.py#newcode229
commit_queue.py:229: # guarantees rietveld will not allow any changes
done

[commit-bot: I haz the power, 2014-01-23 02:01:03]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/sergeyberezin@chromium.org/145173004/6...

[commit-bot: I haz the power, 2014-01-23 02:01:22]

Change committed as 246483