[Android] Add JUnit4 to third_party/junit/.

[Android] Add JUnit4 to third_party/junit/.

This CL adds JUnit4 to chromium android checkouts. It will be used for
host-side java unit testing. This should allow us to both write new
tests for existing java code and convert some existing device-side
instrumentation tests.

BUG=316383
Committed: https://crrev.com/c96b36794250cc0e14cc7d9aac882a394bfd5a62
Cr-Commit-Position: refs/heads/master@{#294966}

[jbudorick, 2014-09-09 18:25:33]

jbudorick@chromium.org changed reviewers:
+ darin@chromium.org, klundberg@chromium.org

[klundberg, 2014-09-09 18:50:33]

lgtm

[jbudorick, 2014-09-15 17:42:28]

OSPTR gave out-of-band lgtm

[navabi, 2014-09-15 17:52:32]

navabi@google.com changed reviewers:
+ navabi@google.com

[navabi, 2014-09-15 17:52:33]

lgtm

[jbudorick, 2014-09-15 19:43:20]

jbudorick@chromium.org changed reviewers:
+ brettw@chromium.org, cpu@chromium.org

[jbudorick, 2014-09-15 19:43:20]

+brettw, cpu for alternative OWNERS review

ptal

[cpu_(ooo_6.6-7.5), 2014-09-15 23:17:05]

lgtm

[jbudorick, 2014-09-15 23:17:21]

The CQ bit was checked by jbudorick@chromium.org

[jbudorick, 2014-09-15 23:28:31]

The CQ bit was unchecked by jbudorick@chromium.org

[jbudorick, 2014-09-15 23:28:32]

The CQ bit was checked by jbudorick@chromium.org

[commit-bot: I haz the power, 2014-09-15 23:32:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/556893004/60001

[commit-bot: I haz the power, 2014-09-16 01:36:35]

Committed patchset #4 (id:60001) as d11cffb0009942033f67f74d7eb029c432596ca5

[commit-bot: I haz the power, 2014-09-16 01:39:03]

Patchset 4 (id:??) landed as
https://crrev.com/c96b36794250cc0e14cc7d9aac882a394bfd5a62
Cr-Commit-Position: refs/heads/master@{#294966}