I wasted a couple of hours this morning trying to figure out why the OK Google feature disappeared from Google Chrome for Windows/Mac/Linux. Turns out that Google removed the feature with the latest Chrome update (Version 46.0.2490.71 m).
Why? Apparently, I was the only person who used the feature. Also gone is the Notification Center. Never heard of it? Me neither. So, I guess I won’t be missing that feature. But, I will miss being able to wake Chrome up by saying “OK Google.”. The feature still exists, however, on the Android platform for phones and tablets.