I am not too sure if you guys have experienced this but this is something that keeps on happening with me reguarlarly on different flavors of Linux. The Google chrome browser just gets stuck in full screen mode on the secondary screen. Pressing F11 just does not help. So what do you do if this happens? How do you recover your beloved chrome? Going through http://code.google.com/p/chromium/issues/detail?id=116044 I realized that you could just remove all the settings in your profile for Google chrome and the browser would reset to default. You will loose your bookmarks and settings but atleast you can use the browser again. Use Google sync to save your time and you can just log into Google account and get your bookmarks and apps back.
All you need to do is go to
/home/user/.config/ and here you will get your
google-chrome folder. You can just do a
rm -rf /home/user/.config/google-chrome/ and then try launching the browser. It should be the way it launched the first time. This is not a perfect solution but a decent work around I guess.