Tried many suggestion, going into terminal and modifying chrome start script.
Finally got the audio with Chrome by going back with all default and simply go into the Chrome Add-On Configuration page :
1) Enabled "Use Custom Audio Device"
2) -Audio Device : plughw:0,3
Card0 and device 3 was my hdmi output from my NUC7CPYH...
And no need to disable the "Keep audio alive" in Kodi Audio settings..
Hoping that this config is kept when Chrome gets updated... ?