VULNERABILITY DETAILS
ASLR⊕Cache (or AnC for short) claims to bypass ASLR protections by measuring MMU cache timings from JavaScript running in Chrome. See https://www.vusec.net/projects/anc/ and https://www.vusec.net/download/?t=papers/anc_ndss17.pdf for more details.

This bug is almost certainly a duplicate, since the authors mention that they disclosed the vulnerability to browser vendors in October 2016 (ahead of the public disclosure which just happened in February 2017), but filing it just in case as I haven't heard any mention of AnC on mailing lists.

VERSION
Chrome Version: presumably stable
Operating System: all

REPRODUCTION CASE
See videos on https://www.vusec.net/projects/anc/ (they omit the actual JS code from the public disclosure, though they probably already sent it to Chrome in October).
The native code variant is available on https://github.com/vusec/revanc.