Fix the automated regression check

It seems that this was a thing before, but I guess it had bit-rotted.
This updates it to use the new `--presubmit` option to the touch tests,
which only fails if a regression occurs in a known test or an unknown
(new) test fails.

TEST=cause a regression and check the presubmit fails

Cq-Depend: chromium:2171940
Change-Id: I6903056d2b180c6a0fd607f4986e2ffe7cf5098e
Tested-by: Harry Cutts <>
Reviewed-by: Sean O'Brien <>
Commit-Queue: Harry Cutts <>
3 files changed