Currently, the run-layout-tests script aborts the run if there is a large number of failures (500) or crashes/timeouts (50). Meanwhile, the run-webdriver-tests script keeps going despite the number of failures. In the GTK4, this makes the webdriver step fill the disk with core dumps. We should add something similar to '--exit-after-n-crashes-or-timeouts`/`--exit-after-n-failures` to run-webdriver-tests.
<rdar://problem/85507941>