Removed old SDCH ProblemCode constants that are no longer being used in UMA.

Removed old SDCH ProblemCode constants that are no longer being used in UMA.

BUG=None
R=ellyjones@chromium.org

Committed: https://crrev.com/3867cad4c27eaf5e3946ea3e28a0468d579d2fca
Cr-Commit-Position: refs/heads/master@{#324241}

[Randy Smith (Not in Mondays), 2015-04-06 20:38:53]

Elly: This is a little bit of cleanup I thought it was easier to just do rather
than record/hand-over/etc.  WDYT?

[Elly Fong-Jones, 2015-04-07 16:30:13]

lgtm

[Randy Smith (Not in Mondays), 2015-04-07 17:49:04]

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

[Randy Smith (Not in Mondays), 2015-04-07 17:49:05]

Alexei: Stamp on histograms.xml?

[Alexei Svitkine (slow), 2015-04-07 18:42:08]

lgtm

[Randy Smith (Not in Mondays), 2015-04-08 02:54:31]

The CQ bit was checked by rdsmith@chromium.org

[commit-bot: I haz the power, 2015-04-08 02:54:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1068493003/1

[commit-bot: I haz the power, 2015-04-08 09:30:08]

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

[commit-bot: I haz the power, 2015-04-08 09:30:09]

Try jobs failed on following builders:
  linux_chromium_clobber_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[Randy Smith (Not in Mondays), 2015-04-08 15:18:20]

The CQ bit was checked by rdsmith@chromium.org

[commit-bot: I haz the power, 2015-04-08 15:18:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1068493003/1

[commit-bot: I haz the power, 2015-04-08 17:05:54]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-08 17:07:49]

Patchset 1 (id:??) landed as
https://crrev.com/3867cad4c27eaf5e3946ea3e28a0468d579d2fca
Cr-Commit-Position: refs/heads/master@{#324241}