I have the same setup as eduardobape and I too cannot get code to open in Chrome even though it is set as the default browser.
I tried ln -sf /usr/bin/gvfs-open /usr/bin/gnome-open and received the message: ln: failed to create symbolic link `/usr/bin/gnome-open': Permission denied
I then tried sudo ln -sf /usr/bin/gvfs-open /usr/bin/gnome-open. No error returned, but it still opens in Firefox.
I have a Windows 7 x64 laptop with Sublime Text 2 installed and code opens in Chrome fine.
Any resolution to this issue? I'm honestly ready to plunk down the money for this editor, but I'd like it to work the same across all my computers.