Fix UserAction presubmit incorrectly not matching existing actions.

Fix UserAction presubmit incorrectly not matching existing actions.

BUG=340735
TBR=maruel@chromium.org
NOTRY=true

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=255530

[Ted C, 2014-03-07 01:46:13]

PTAL

Found this while doing this change:
https://codereview.chromium.org/177013006/

'ShowHistory' exists and this wasn't matching because of the 'r' literal
escaping looking for '\' 'n' instead of a newline

[Ilya Sherman, 2014-03-07 01:46:47]

LGTM, thanks Ted!

[Ilya Sherman, 2014-03-07 01:46:50]

The CQ bit was checked by isherman@chromium.org

[Ted C, 2014-03-07 01:52:09]

+maruel (TBRing since it's a small change)

[commit-bot: I haz the power, 2014-03-07 01:52:55]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tedchoc@chromium.org/189783002/1

[commit-bot: I haz the power, 2014-03-07 04:34:15]

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

[commit-bot: I haz the power, 2014-03-07 04:34:16]

Try jobs failed on following builders: mac_chromium_compile_dbg

[Ilya Sherman, 2014-03-07 04:34:50]

The CQ bit was checked by isherman@chromium.org

[commit-bot: I haz the power, 2014-03-07 04:39:17]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tedchoc@chromium.org/189783002/1

[commit-bot: I haz the power, 2014-03-07 04:50:08]

Change committed as 255530

[Alexei Svitkine (slow), 2014-03-07 15:55:37]

lgtm, ty