Comment 3 for bug 1379610

> 1. surfaceA emits a frame, one is scheduled
> 2. surfaceA emits another frame, but still only one is scheduled for compositing

Isn't schedule_compositing() called with num_frames=2 the second time (I would expect buffers_ready_for_compositor() to return 2 the second time, if the first frame hasn't been rendered)?