Fix typos in num_failures_by_type for json results.

Fix typos in num_failures_by_type for json results.

This changes a few occurrences of "Failure" -> "FAIL" and "Pass" -> "PASS"
to conform to the doc format. The existing data is not actually being
used yet, but the flakiness dashboard needs the correct values.

Also fix a typo in run_mojo_python_tests that was preventing us from
running individual tests on the command line.

R=ojan@chromium.org, viettrungluu@chromium.org, grt@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=286504

[tonyg, 2014-07-29 21:23:35]

tools/telemetry owners lgtm

[ojan, 2014-07-29 23:33:55]

lgtm

[commit-bot: I haz the power, 2014-07-29 23:36:18]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/dpranke@chromium.org/429013004/1

[Dirk Pranke, 2014-07-29 23:38:51]

Greg, Trung, can I get OWNERS approvals?

[viettrungluu, 2014-07-30 00:23:04]

On 2014/07/29 23:38:51, Dirk Pranke wrote:
> Greg, Trung, can I get OWNERS approvals?

LGTM, sorry for the delay.

[grt (UTC plus 2), 2014-07-30 01:12:19]

On 2014/07/29 23:38:51, Dirk Pranke wrote:
> Greg, Trung, can I get OWNERS approvals?

You got it: lgtm

[commit-bot: I haz the power, 2014-07-30 03:54:09]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_dbg_triggered_tests on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_dbg_tri...)
  win_chromium_x64_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[commit-bot: I haz the power, 2014-07-30 05:37:30]

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

[commit-bot: I haz the power, 2014-07-30 05:37:31]

Try jobs failed on following builders:
  win_chromium_x64_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[grt (UTC plus 2), 2014-07-30 11:11:38]

The CQ bit was checked by grt@chromium.org

[commit-bot: I haz the power, 2014-07-30 11:12:29]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/dpranke@chromium.org/429013004/1

[commit-bot: I haz the power, 2014-07-30 14:00:33]

Change committed as 286504