michael@0: A word to the wise:
michael@0: 
michael@0: You must ensure that if your test finishes successfully, no processes have
michael@0: priority FOREGROUND_HIGH.
michael@0: 
michael@0: If you don't do this, expect to see tests randomly fail with mysterious
michael@0: FOREGROUND --> FOREGROUND priority transitions.
michael@0: 
michael@0: What's happening in this case is that your FOREGROUND_HIGH process lives until
michael@0: the beginning of the next test.  This causes the process started by the next
michael@0: test to have low CPU priority.  Then the FOREGROUND_HIGH process dies, because
michael@0: its iframe gets GC'ed, and we transition the new test's process from low CPU
michael@0: priority to regular CPU priority.
michael@0: 
michael@0: Ouch.