In the settings from Google Chrome, in Appearance, you have to choose GTK+theme.
You also have to enable 'Use system title bar and borders.'
To make it work, you have to logout, and login.
Now you can test it with the Unity Tweak Tool (You can download that program from the Ubuntu Software Center).
In Unity Tweak Tool, choose Window Controls. Change Alignment from Left to Right, or from Right to Left. The title bar form Google Chrome will change immediately.
The reason why it works, I guess, is because by default Google Chrome doesn't call the gtk-window-decorator that comes with the Compiz window manager. If you install the CompizConfig Settings Manager (from the Ubuntu Software Center), you will see that the Windows Decoration module uses the program
So, this works problaby only when you're running a default Ubuntu 13.04 setup. That means: the Compiz window manager and a GTK+ enabled theme (Ambiance for example).