I had the same issue as Jason Swaan had, on Ubuntu MATE 15.04 as well.
The exact lines that fixed this was "StartupWMClass=Google-chrome-stable".
This line was added to the following sections: [Desktop Entry] [NewWindow Shortcut Group] [NewIncognito Shortcut Group]
I had the same issue as Jason Swaan had, on Ubuntu MATE 15.04 as well.
The exact lines that fixed this was "StartupWMClass =Google- chrome- stable" .
This line was added to the following sections:
[Desktop Entry]
[NewWindow Shortcut Group]
[NewIncognito Shortcut Group]