Steve Gibson have a nice round-up where he explains how certificate revocation does work and why Chrome and Chromiums certificate revocation scheme doesn't work. I recommend to read both Steve Gibson's article on An Evaluation of the Effectiveness of Chrome's CRLSets and Adam Langley's in my opinion a bit missplaced answer Revocation still doesn't work.
How to be safe
Use Firefox until Chrome is fixed.
In Firefox enable hard fail on OCSP errors.
Goto Preferences → Advanced → Certificates → Validation.
Check When an OSCP server connection failes, treat the certificate as invalid.