Disable the UserCrash test temporarily because it is flaky.

We've seen lots of failures on the buildbots for this test.
These failures have caused Tree Closures.

Example failure: http://build.chromium.org/p/chromiumos/builders/x86%20pineview%20full/builds/1565/steps/cbuildbot/logs/stdio

I've filed a bug to re-enable the test. See http://crosbug.com/13656

BUG=chromium-os:13656
TEST=Test on buildbots

Change-Id: I1e51f59dd2683d8ebdf25f143f2b54b94b61d7eb

R=jiesun@chromium.org

Review URL: http://codereview.chromium.org/6675036
1 file changed