Telemetry: Re-enable slide_drawer in key_silk_cases

Telemetry: Re-enable slide_drawer in key_silk_cases

This test had been disabled because of failures in
smoothness.key_silk_cases, but these failures are no
longer reproducible locally or on the perf trybots.

BUG=404317
Committed: https://crrev.com/67fc9c2caf8dd58bfefaff4fed074832b817f869
Cr-Commit-Position: refs/heads/master@{#308464}

[ajuma, 2014-12-10 20:53:38]

ajuma@chromium.org changed reviewers:
+ ernstm@chromium.org

[ajuma, 2014-12-15 15:26:10]

ernstm, PTAL.

[ernstm, 2014-12-15 23:15:01]

The CQ bit was checked by ernstm@chromium.org

[ernstm, 2014-12-15 23:15:01]

lgtm

[commit-bot: I haz the power, 2014-12-15 23:15:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/791183002/20001

[commit-bot: I haz the power, 2014-12-16 00:04:07]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2014-12-16 00:05:54]

Patchset 2 (id:??) landed as
https://crrev.com/67fc9c2caf8dd58bfefaff4fed074832b817f869
Cr-Commit-Position: refs/heads/master@{#308464}