Make metrics pretty_print.py scripts runnable from git cl format.

Make metrics pretty_print.py scripts runnable from git cl format.

Adds some additional command-line params to metrics (histograms,
actions, rappor) pretty_print.py scripts that format XML files
so that they can be invoked by 'git cl format'. This will allow
(in a follow-up CL to depot tools) to have git cl format invoke
these scripts automatically when ran.

BUG=679514
Review-Url: https://codereview.chromium.org/2674283002
Cr-Commit-Position: refs/heads/master@{#448292}
Committed: https://chromium.googlesource.com/chromium/src/+/02441ca994699e2ce6fe29247a4f97970899c721

[Alexei Svitkine (slow), 2017-02-06 15:41:02]

asvitkine@chromium.org changed reviewers:
+ isherman@chromium.org

[Ilya Sherman, 2017-02-06 17:21:47]

LGTM, thanks.

[Ilya Sherman, 2017-02-06 17:21:57]

The CQ bit was checked by isherman@chromium.org

[commit-bot: I haz the power, 2017-02-06 17:22:28]

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, 2017-02-06 17:45:27]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1486401717126200, "parent_rev":
"db713b182a14c3aacabed95d3b28f8885b1a633f", "commit_rev":
"02441ca994699e2ce6fe29247a4f97970899c721"}

[commit-bot: I haz the power, 2017-02-06 17:46:26]

Description was changed from

==========
Make metrics pretty_print.py scripts runnable from git cl format.

Adds some additional command-line params to metrics (histograms,
actions, rappor) pretty_print.py scripts that format XML files
so that they can be invoked by 'git cl format'. This will allow
(in a follow-up CL to depot tools) to have git cl format invoke
these scripts automatically when ran.

BUG=679514
==========

to

==========
Make metrics pretty_print.py scripts runnable from git cl format.

Adds some additional command-line params to metrics (histograms,
actions, rappor) pretty_print.py scripts that format XML files
so that they can be invoked by 'git cl format'. This will allow
(in a follow-up CL to depot tools) to have git cl format invoke
these scripts automatically when ran.

BUG=679514

Review-Url: https://codereview.chromium.org/2674283002
Cr-Commit-Position: refs/heads/master@{#448292}
Committed:
https://chromium.googlesource.com/chromium/src/+/02441ca994699e2ce6fe29247a4f...
==========

[commit-bot: I haz the power, 2017-02-06 17:46:27]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/02441ca994699e2ce6fe29247a4f...