I'm just happy tabs use the title space in Chrome on Win7. I never ever understood why all that space was wasted by title bars. (It still wastes a lot of space in OS X, though not as bad)
Unless you want to move the window, in which case trying to click on those 15 remaining pixels above the tab bar is very difficult (at least on OS X, not sure if it's different on Windows).
You can click anywhere on the 'dark grey' to move the bar, including to the right of any tabs or beneath the stoplights. Personally, I think those 15 pixels above the tabs need to go away, too.
