I wrote a post last summer about preventing Chrome from stealing the media buttons (like play, pause, previous track and next track) from OS X. Now that I’m using Linux regularly and I fell in love with Google Play Music All Access, I found that GNOME was stealing the media keys from Chrome.
The fix is quite simple. Press the SUPER key (Windows key or Mac Command key), type settings, and press enter. Click on Keyboard and then on the Shortcuts tab. You should now see something like this.