Add SYN_DROPPED test

The test bombards the evdev kernel driver to generate SYN_DROPPED event(s)
as the queue inside will be filled up quickly. Therefore, we should be able
to see the SYN_DROPPED event and process it inside CMT driver by examining
the log file Xorg.0.log.

BUG=chromium-os:28997
TEST=run the test and it should succeed if we have the sync. logic implemented,
or fail if not.

Change-Id: I9a0622db7980ec46900dbf00ae6bcf026b2d7fdd
Reviewed-on: https://gerrit.chromium.org/gerrit/20283
Commit-Ready: Chung-yih Wang <cywang@chromium.org>
Reviewed-by: Chung-yih Wang <cywang@chromium.org>
Tested-by: Chung-yih Wang <cywang@chromium.org>
5 files changed