The images posted in that article look pretty bad. Why are they adding so much wasted space above the tabs?
The current chrome UI is quite good at exposing necessary functionality without wasting space.
The current chrome UI is quite good at exposing necessary functionality without wasting space.
You're probably used to seeing a maximized Chrome windows, which don't have that space.
The space is present in free-floating windows to provide space for the mouse to grab and move it around (because grabbing on a tab would split the tab out into a new window).
At least, this is how it works in Windows, and (iirc) quite a few *nix window managers. Can't say for sure; I'm currently on i3 with window decorations disabled and my floating windows don't have it (and I can drag using any part of a floating window with alt+drag). Don't know how OSX behaves.