Hello,
the "Chrome Hotword" speech recognition was removed from debian chromium.
Embarrassingly chromium 43 introduced this extension by silently downloading a binary blob,
so users only needed to command "OK google" to activate the feature.
https://bugs.debian.org/786909 (https://bugs.debian.org/786909) and https://lwn.net/Articles/648392/ (https://lwn.net/Articles/648392/)
greetings
musca