https://chromium-review.googlesource.com/c/571290

Patch Set 2 had this (incorrect) line:
CQ-DEPENDS=CQ:489689

Which caused a message like the one below to be appended every 1-3 minutes, until somebody edited the commit message:

The Pre-Commit Queue failed to apply your change in https://luci-milo.appspot.com/buildbot/chromeos/pre-cq-launcher/9624 . CL:571290 has a malformed CQ-DEPEND target: Expected 'CQ-DEPEND=', but got u'CQ-DEPENDS'