http://bugs.winehq.org/show_bug.cgi?id=25166
--- Comment #25 from Jerome Leclanche adys.wh@gmail.com 2011-11-20 11:42:51 CST --- (In reply to comment #24)
From google-chrome.desktop (snipped a bit)
[Desktop Entry] Version=1.0 Name=Google Chrome GenericName=Web Browser Comment=Access the Internet Exec=/opt/google/chrome/google-chrome %U Terminal=false Icon=google-chrome Type=Application Categories=Network;WebBrowser; MimeType=text/html;text/xml;application/xhtml_xml;x-scheme-handler/http;x-scheme-handler/https;x-scheme-handler/ftp; X-Ayatana-Desktop-Shortcuts=NewWindow;NewIncognito
[NewWindow Shortcut Group] Name=New Window Exec=/opt/google/chrome/google-chrome TargetEnvironment=Unity
[NewIncognito Shortcut Group] Name=New Incognito Window Exec=/opt/google/chrome/google-chrome --incognito TargetEnvironment=Unity
I don't know how much support this has, though.