Re-enable last remaining key_silk_cases tests on Android

Re-enable last remaining key_silk_cases tests on Android

Did not see any problems running these two tests locally for a few
hours.

BUG=355952
TBR=tonyg@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=274484

[Sami, 2014-06-02 13:12:42]

The CQ bit was checked by skyostil@chromium.org

[commit-bot: I haz the power, 2014-06-02 13:13:05]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/skyostil@chromium.org/302313002/1

[commit-bot: I haz the power, 2014-06-02 17:50:35]

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

[commit-bot: I haz the power, 2014-06-02 18:37:37]

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

[commit-bot: I haz the power, 2014-06-02 18:37:37]

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

[Sami, 2014-06-03 11:12:08]

The CQ bit was checked by skyostil@chromium.org

[commit-bot: I haz the power, 2014-06-03 11:12:28]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/skyostil@chromium.org/302313002/1

[commit-bot: I haz the power, 2014-06-03 12:38:50]

Change committed as 274484