Able to reproduce this issue on Mac 10.12.6, Win-10 and Ubuntu 14.04 using chrome reported version #65.0.3325.51 and latest canary #66.0.3347.0.
This is a non-regression issue as it is observed from M60 old builds. 

Hence, marking it as untriaged to get more inputs from dev team.

Thanks...!!

Not a language issue.

sdy@ is this on your plate for all platforms?  If not let me know and my team can handle windows/linux.  Thanks!

Please bounce to shaktisahu@ if you want us to handle it.

dtrainor@: This is on my plate for Mac, and the change that broke it is in Mac-specific code ( issue 823108 ). Other platforms would have to be a separate problem.

Thanks all! +conops hotlist for tracking.

krajshree@ what file are you using to test the steps in #2?  I'm able to see a "Keep" in the drop down for the dialog.  I think if it's explicitly detected as malicious on linux/windows we don't show keep, but for downloads we think are potentially dangerous based on file type we still have the option.

The "launch" links on this page have worked for me in testing the Mac variant of this:
https://docs.oracle.com/javase/tutorial/uiswing/examples/misc/index.html

I see the "Keep" option on the top few of those for linux at least.  sdy@ should all of those break or was there a particular one that you saw broke?  krajshree@ can you try out the instructions for #11 and let me know if you're seeing a failure on a particular link?  Thanks!

I'm going to tentatively dupe this this because the original report only mentions Mac and krajshree@'s reply says that this goes back to M60 on all platforms — which I'm fairly sure would have been noticed. So, maybe the reply was meant for a different bug?