Remove flaky crash test expectation

This was broken by the first landing of crrev.com/159403002, which was
reverted. The second iteration has fixed this problem.

BUG=343185

Review URL: https://codereview.chromium.org/165253002

git-svn-id: svn://svn.chromium.org/blink/trunk@167132 bbb929c8-8fbe-4397-9dbb-9b2b20218538