Hey this google chrome skin has made some progress since last time I heard about it. It's still light years behind opera 12 and sadly will never regain what it lost.
If you're interested in the actual reborn opera experience, it's vivaldi you're looking for, opera co-founder and many for the original opera team is making vivaldi and though based on blink engine too, hence limited and unable to do exactly what opera used to, it has the same philosophy and vision.
The other alternative is the free software otter[1] browser aiming at recreating the opera 12 experience.