Add tests for the OverlayPanelEventFilter

Add tests for the OverlayPanelEventFilter

BUG=584340
Committed: https://crrev.com/e63177a3d418d078a8777d83f817c11e30831d7b
Cr-Commit-Position: refs/heads/master@{#393996}

[mdjones, 2016-03-16 20:31:32]

mdjones@chromium.org changed reviewers:
+ dtrainor@chromium.org, pedrosimonetti@chromium.org, twellington@chromium.org

[mdjones, 2016-03-16 20:31:33]

These are the tests that were previously in
https://codereview.chromium.org/1739203003/

The problem is that since that class is not yet used, proguard removes the class
and the tests fail. I'll land this after the class becomes used.

[Theresa, 2016-03-16 20:42:17]

lgtm

[pedro (no code reviews), 2016-03-16 21:14:54]

lgtm

[David Trainor- moved to gerrit, 2016-04-15 15:51:53]

lgtm

[mdjones, 2016-05-16 22:33:32]

The CQ bit was checked by mdjones@chromium.org

[mdjones, 2016-05-16 22:33:33]

The patchset sent to the CQ was uploaded after l-g-t-m from
twellington@chromium.org, dtrainor@chromium.org, pedrosimonetti@chromium.org
Link to the patchset: https://codereview.chromium.org/1808653006/#ps20001
(title: "rebase")

[commit-bot: I haz the power, 2016-05-16 22:34:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1808653006/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1808653006/20001

[mdjones, 2016-05-16 23:25:29]

The CQ bit was checked by mdjones@chromium.org

[mdjones, 2016-05-16 23:25:29]

The patchset sent to the CQ was uploaded after l-g-t-m from
twellington@chromium.org, dtrainor@chromium.org, pedrosimonetti@chromium.org
Link to the patchset: https://codereview.chromium.org/1808653006/#ps40001
(title: "fix findbugs")

[commit-bot: I haz the power, 2016-05-16 23:25:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1808653006/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1808653006/40001

[commit-bot: I haz the power, 2016-05-17 00:45:19]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2016-05-17 00:46:40]

Description was changed from

==========
Add tests for the OverlayPanelEventFilter

BUG=584340
==========

to

==========
Add tests for the OverlayPanelEventFilter

BUG=584340

Committed: https://crrev.com/e63177a3d418d078a8777d83f817c11e30831d7b
Cr-Commit-Position: refs/heads/master@{#393996}
==========

[commit-bot: I haz the power, 2016-05-17 00:46:41]

Patchset 3 (id:??) landed as
https://crrev.com/e63177a3d418d078a8777d83f817c11e30831d7b
Cr-Commit-Position: refs/heads/master@{#393996}